{"event":"ecommerce_event","event_name":"view_item","event_category":"browse_catalog","ecommerce":{"items":[{"item_id":"XYL155434","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"turkish_school_16th_century","item_category5":"balown","item_list_name":"search_results","item_name":"takyuddin_and_other_astronomers_at_the_galata_observatory_founded_in_1557_by_sultan_suleyman_from_th","item_variant":"undefined"},{"item_id":"CH15834","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"vinci_leonardo_da_1452_1519","item_category5":"not_balown","item_list_name":"search_results","item_name":"studies_of_the_illumination_of_the_moon_fol_1r_from_codex_leicester_c_1506_08_pen_ink_on_paper","item_variant":"undefined"},{"item_id":"PVD1692333","item_category":"photo","item_category2":"undetermined_copyright","item_category3":"standard","item_category4":"unknown_photographer_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_hewlett_packard_s_first_calculator_1968_photo","item_variant":"undefined"},{"item_id":"XIR154000","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"byzantine_school_12th_century","item_category5":"balown","item_list_name":"search_results","item_name":"st_pachomius_d_346_mosaic","item_variant":"undefined"},{"item_id":"AMO184106","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"german_school_17th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"portable_sundial_made_by_lienhart_miller_nuremberg_1614_elephant_ivory","item_variant":"undefined"},{"item_id":"PFH1169839","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"arab_astronomers_use_an_astrolabe_and_a_cross_staff_to_try_to_determine_latitude_in_an_observatory_i","item_variant":"undefined"},{"item_id":"XCF130648","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"balown","item_list_name":"search_results","item_name":"octant_1750_wood","item_variant":"undefined"},{"item_id":"XJF150847","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"stone_frank_1800_59_after","item_category5":"balown","item_list_name":"search_results","item_name":"portrait_of_augusta_ada_byron_1815_52_engraved_by_w_h_mote_fl_1842_64_engraving_b_w_photo","item_variant":"undefined"},{"item_id":"XJF150849","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"balown","item_list_name":"search_results","item_name":"augusta_ada_byron_1815_52_countess_of_lovelace_engraving_b_w_photo","item_variant":"undefined"},{"item_id":"XJF150850","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"balown","item_list_name":"search_results","item_name":"portrait_of_augusta_ada_byron_1815_52_countess_of_lovelace_oil_on_canvas_b_w_photo","item_variant":"undefined"},{"item_id":"BAL267604","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"holbein_the_younger_hans_1497_8_1543","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_ambassadors_detail_1533_oil_on_oak","item_variant":"undefined"},{"item_id":"DPA7391280","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category4":"schoening","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_mechanism_for_antikythera_205_bc_bronze","item_variant":"undefined"},{"item_id":"HST3083730","item_category":"photo","item_category2":"in_copyright","item_category3":"standard","item_category4":"cumming_robert_h_b_1943","item_category5":"not_balown","item_list_name":"search_results","item_name":"67_body_arc_off_circle_center_1975_gelatin_silver_contact_print_with_drawing","item_variant":"undefined"},{"item_id":"UIG531931","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"eratosthenes_knowledge_of_the_sun_s_position_and_distance_between_points_enabled_him_to_calculate_th","item_variant":"undefined"},{"item_id":"UIS5064123","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"babbage_engines_difference_babbage_s_difference_engine_machine_a_differences_no_1_1824_1832","item_variant":"undefined"},{"item_id":"FIA7391262","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_antikythera_mechanism_205_bc_bronze","item_variant":"undefined"},{"item_id":"UIS5069274","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"babbage_engines_analytical_babbage_s_analytical_engine_1834_1871","item_variant":"undefined"},{"item_id":"STC357905","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"dudley_robert_ambrose_1867_1951","item_category5":"not_balown","item_list_name":"search_results","item_name":"cutting_the_hands_cut_from_the_dead_litho","item_variant":"undefined"},{"item_id":"XJF294097","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"german_school_16th_century_after","item_category5":"balown","item_list_name":"search_results","item_name":"a_volvelle_possibly_showing_the_cycles_of_the_moon_after_an_illustration_from_astronomicon_caesareum","item_variant":"undefined"},{"item_id":"MOR3058535","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"a_fifteenth_century_navigator_using_a_cross_staff_an_instrument_used_to_determine_angles_for_example","item_variant":"undefined"},{"item_id":"PIX4643037","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"satellite_gps_triangulation_artist_s_view_of_the_triangulation_system_uses_to_calculate_the_position","item_variant":"undefined"},{"item_id":"UIS5064118","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"babbage_engines_analytical_babbage_s_analytical_engine_machine_analytique_1834_1871","item_variant":"undefined"},{"item_id":"XEE4141127","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"anonymous","item_category5":"balown","item_list_name":"search_results","item_name":"thermodynamics_formula_by_nicolas_leonard_sadi_carnot_to_calculate_the_efficiency_of_a_thermal_machi","item_variant":"undefined"},{"item_id":"GIA4726317","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"french_school_15th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"astrolabe_french_instrument_of_the_15th_century_used_to_calculate_the_night_time_according_to_the_po","item_variant":"undefined"},{"item_id":"GIA4731005","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_16th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"use_of_a_device_to_calculate_the_time_in_relation_to_the_stars_at_night_astrolabe_cosmographia_de_pi","item_variant":"undefined"},{"item_id":"UIS5069772","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"calculating_machines_17th_century_napier_s_bones_batons_de_napier_ou_reglettes_de_neper_c_1690","item_variant":"undefined"},{"item_id":"UIS5077485","item_category":"object","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"babbage_engines_analytical_punched_cards_for_babbage_s_analytical_engine_1834_1871","item_variant":"undefined"},{"item_id":"GIA4806392","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_17th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"experience_carried_out_by_german_scientist_otto_van_guericke_to_calculate_atmospheric_pressure_plate","item_variant":"undefined"},{"item_id":"BL7394910","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"european_school_15th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"volvelle_from_an_astronomical_calendar_with_lunar_and_other_tables_egerton_ms_848_15th_century_ink_c","item_variant":"undefined"},{"item_id":"MEV5046832","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"vinci_leonardo_da_1452_1519","item_category5":"not_balown","item_list_name":"search_results","item_name":"codex_atlanticus_sheet_820_recto_1478_1518_pen_ink","item_variant":"undefined"},{"item_id":"UIS5074965","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"babbage_engines_analytical_charles_babbage_s_analytical_engine_1871","item_variant":"undefined"},{"item_id":"UIS5096710","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"taking_a_lunar_distance_1891","item_variant":"undefined"},{"item_id":"UIS5100911","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"index_chart_to_the_great_trigonometrical_survey_of_india_1870","item_variant":"undefined"},{"item_id":"UIG539859","item_category2":"undetermined_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"using_astrolabes_to_calculate_the_height_of_a_steeple_from_peter_apian_cosmographia_antwerp_1539_woo","item_variant":"undefined"},{"item_id":"UIG541805","item_category2":"undetermined_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"using_a_quadrant_with_a_plumb_bob_to_calculate_the_height_of_a_tower_by_triangulation_from_sebastian","item_variant":"undefined"},{"item_id":"SZT3001809","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"calculating_machine_1675","item_variant":"undefined"},{"item_id":"UIG540878","item_category2":"undetermined_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"using_a_quadrant_with_a_plumb_bob_to_calculate_the_height_of_a_tower_by_triangulation_from_sebastian","item_variant":"undefined"},{"item_id":"AVE6322208","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"usa_1950s_man_having_his_height_and_weight_measured","item_variant":"undefined"},{"item_id":"AVE6322211","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"usa_1950s_chart_showing_the_energy_metabolism_and_respiration_of_a_person_on_a_machine","item_variant":"undefined"},{"item_id":"SZT3001806","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"sketch_of_a_calculating_machine_1632_b_w_photo","item_variant":"undefined"},{"item_id":"LLM7166034","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"szantos_louis_1889_1965","item_category5":"not_balown","item_list_name":"search_results","item_name":"picturesque_word_origins_calculate_litho","item_variant":"undefined"},{"item_id":"SSI2176336","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"statue_of_a_caveman_using_stones_to_calculate","item_variant":"undefined"},{"item_id":"CCI1836066","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"calculate_machine_russia_c_1850_photo","item_variant":"undefined"},{"item_id":"AVE6326057","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"united_states_1950s_hand_writes_math_equations_on_paper","item_variant":"undefined"},{"item_id":"AVE6322210","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"usa_1950s_calculation_of_basal_metabolism_using_a_formula_on_a_chart","item_variant":"undefined"},{"item_id":"SZT6310378","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"scherl","item_category5":"not_balown","item_list_name":"search_results","item_name":"technische_nothilfe_in_belzig_1938_b_w_photo","item_variant":"undefined"},{"item_id":"SZT2978837","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"post_of_computing_section_of_a_battery_during_a_maneuver_b_w_photo","item_variant":"undefined"},{"item_id":"SZT2978753","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"soldiers_of_the_reichswehr_at_the_naval_school_in_swinoujscie_1920_b_w_photo","item_variant":"undefined"},{"item_id":"AVE6325585","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"1970s_women_walk_down_city_street","item_variant":"undefined"},{"item_id":"GIA4776423","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"a_milliamperemeter_or_amperemeter_apparatus_designed_to_calculate_the_intensity_of_the_electric_curr","item_variant":"undefined"},{"item_id":"SZT2978840","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"post_of_computing_section_of_a_battery_during_a_maneuver_of_the_reichswehr_1930_b_w_photo","item_variant":"undefined"},{"item_id":"AVE6325589","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"1970s_women_sit_at_desk_writing_on_paper","item_variant":"undefined"},{"item_id":"CUL4887780","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category4":"fonollosa_francisco_d_c_1998","item_category5":"not_balown","item_list_name":"search_results","item_name":"formula_to_calculate_the_energy_of_albert_einstein_e_mc2_oil_on_canvas","item_variant":"undefined"},{"item_id":"LRI9037019","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"cyclographic_machine_17th_century_gold_plated_brass_wood","item_variant":"undefined"},{"item_id":"BON23720","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"aldin_cecil_charles_windsor_1870_1935","item_category5":"not_balown","item_list_name":"search_results","item_name":"to_learn_to_calculate_the_height_of_objects_from_the_top_of_which_you_can_jump","item_variant":"undefined"},{"item_id":"KWE7239636","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"yoshitora_utagawa_1836_80","item_category5":"not_balown","item_list_name":"search_results","item_name":"two_chinese_men_with_an_abacus","item_variant":"undefined"},{"item_id":"SZT9227145","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"joachim_krack","item_category5":"not_balown","item_list_name":"search_results","item_name":"two_girls_with_an_abacus_in_guestrow_circa_the_1930s_photo","item_variant":"undefined"},{"item_id":"LLM8673173","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"weighing_the_earth_in_a_pair_of_scales_on_a_high_tower_litho","item_variant":"undefined"},{"item_id":"UDK844984","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"items_needed_to_calculate_astrological_charts_including_a_calculator_discs_showing_signs_of_the_zodi","item_variant":"undefined"},{"item_id":"XEE4168462","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"unknown_artist_19th_century","item_category5":"balown","item_list_name":"search_results","item_name":"walkers_try_to_calculate_the_age_of_a_dead_oak_by_studying_the_tree_s_strain_engraving_late_19th_cen","item_variant":"undefined"},{"item_id":"LLM11694383","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"european_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"eratosthenes_s_method_for_measuring_the_size_of_the_earth_litho","item_variant":"undefined"},{"item_id":"TRK8619175","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"nunes_pedro_1502_78","item_category5":"not_balown","item_list_name":"search_results","item_name":"shadow_instrument_16th_century","item_variant":"undefined"},{"item_id":"IMO8758185","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_in_a_secondary_school_in_boc","item_variant":"undefined"},{"item_id":"IMO8758187","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_1965_photo","item_variant":"undefined"},{"item_id":"IMO8758203","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_1965_photo","item_variant":"undefined"},{"item_id":"AVE6327465","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"united_states_1950s_man_types_numbers_into_machine_and_print_receipt","item_variant":"undefined"},{"item_id":"TRK7133628","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"different_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"JEB4887503","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"ribot_auguste_theodule_1823_91","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_accountant_cook_1862_oil_on_canvas","item_variant":"undefined"},{"item_id":"REU8069361","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"bobby_yip","item_category5":"not_balown","item_list_name":"search_results","item_name":"workers_calculate_pay_claims_after_closing_of_treasure_restaurant_in_hong_kong_2002_06_06_photo","item_variant":"undefined"},{"item_id":"IMO8758176","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_in_a_secondary_school_in_boc","item_variant":"undefined"},{"item_id":"IMO8758177","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_1965_photo","item_variant":"undefined"},{"item_id":"IMO8758200","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_in_a_secondary_school_in_boc","item_variant":"undefined"},{"item_id":"TRK7133641","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"trigonometric_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"SSI2164684","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"businessman_operating_an_adding_machine","item_variant":"undefined"},{"item_id":"TRK7133637","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"figures_depicting_trigonometric_calculus_1779_engraving","item_variant":"undefined"},{"item_id":"IMO8758182","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_in_a_secondary_school_in_boc","item_variant":"undefined"},{"item_id":"IMO8758194","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"klaus_rose","item_category5":"not_balown","item_list_name":"search_results","item_name":"secondary_school_in_bochum_1965_deu_germany_bochum_students_and_teacher_in_a_secondary_school_in_boc","item_variant":"undefined"},{"item_id":"LLM8628933","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"american_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"portrait_of_jedediah_buxton_engraving","item_variant":"undefined"},{"item_id":"LLM8659936","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_photographer_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"modern_wonders_1938_weighing_the_earth_colour_photo","item_variant":"undefined"},{"item_id":"AVE6327467","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"united_states_1950s_man_writes_notes_in_book","item_variant":"undefined"},{"item_id":"TRK7133611","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133612","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"dynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133614","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"hydrodynamics_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133625","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"figures_with_different_calculations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133639","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"conical_sections_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133631","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"expanded_table_of_the_epacts_of_the_new_moons_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133640","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"geometric_figures_1779_engraving","item_variant":"undefined"},{"item_id":"AVE8900813","item_category":"footage","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"1960s_scientist_looks_over_equations_in_binder_circles_an_answer_with_pencil","item_variant":"undefined"},{"item_id":"TRK7133638","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"trigonometric_calculation_illustrations_1779_engraving","item_variant":"undefined"},{"item_id":"TRK7133620","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"figures_with_different_calculations_1779_engraving","item_variant":"undefined"}]}}

{"event":"custom_event","event_name":"view_search_result","event_category":"browse_catalog","keyword":"calculate","search_type":"standard","search_bridgeman_artists":"false","search_mode":"automatic","search_zero_result":"false","search_results":300,"search_results_page_number":1}