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    • 1992-Nov-05 (First session)
    • 1992-Nov-07 (Second session)
    • 1992-Nov-09 (Third session)

    Charles M. Rubin grew up in Deal, New Jersey. He was especially interested in science and mathematics, enjoying problem-solving. Rubin entered the University of Pennsylvania for his undergraduate degree. He spent…

    • 1947

    Informational pamphlet about margarine published and distributed by the Kraft Foods Company Customer Service Department. The pamphlet details the ingredients and process for making Kraft Parkay, with an emphasis on…

    • 1937-Aug-17

    The letter discusses Beckman's scheduled meetings, marketing strategies for the pH meter, and interest in postal meters.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the…

    • 1922

    Junior high school or high school-aged male students gather around a teacher who is conducting a scientific experiment. Several students have their hands raised. Pennants on the wall list "Pioneer Science Club" and…

    • 1922

    Scientific diagram illustrates the percentage composition of foods including corn, potato, onion, apple, peanut butter and olive oil. Illustrations are after the charts created by Charles Ford Langworthy of the United…

    • 1922

    Scientific diagram illustrates the percentage composition of foods including a pork chop, cod, egg, cream cheese, bean and bread. Illustrations are after the charts created by Charles Ford Langworthy of the United…

    • 1922

    Printed photographic reproduction illustrating two wiring plans for a doorbell: one bell and two push buttons with either button ringing the bell, the other showing two bells and two push buttons with each button…

    • 1922

    Daily weather map of the United States with symbols indicating the state of weather as well as isobars and isotherms illustrated by continuous or dotted lines, respectively. Arrows denote wind direction.

    Illustration…

    • 1922

    Map illustrating the Wachusett, Sudbury and Cochituate watersheds with the reservoirs, aqueducts and pipe pines that supply water to Boston, Massachusetts. Caption reads "This is one of the greatest water systems of the…

    • 1922

    Junior high school/high school-level textbook on science with topics including air; food; water; weather; fire; heating, lighting and electricity within homes; clothing and microscopic organisms. Begins with a foreword…

    • 1900 – 1920

    Developed circa 1900 and often called the Tallquist Method, it is used to compare a patient's blood color to a chart of red colors to diagnose possible anemia. The method is still used when more sophisticated equipment…

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    No. 1639. Parabolic Reflectors, used to collect sound, light or radio waves.
    No. 1641. Melloni's Apparatus, for demonstrating the phenomena of absorption, polarization, reflection and refraction of radiant heat.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Steam and gas engines.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    "This apparatus was designed to supply our own laboratory with an electro-magnet of sufficient strength and field concentration for magnetizing, experimentation, etc. With its accessories listed below it becomes…

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Quadrant electrometer and electrometer for radioactive measurements.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Static electricity generator used for experiments and powering X-ray machines.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    No. 2213 is a Dynamo Analysis Apparatus, an electrical generator.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Various Geissler tubes for demonstration purposes. Invented by the glassblower, Johann Heinrich Wilhelm Geissler (1815-1878), a light is produced when an electric current is passed through the rarefied gas filled tubes.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Various vacuum tubes for cathode ray demonstrations, including Crookes' Tubes, Holtz' Tube, and Lenard's Tube.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Apparatus for showing the principles of an induction or alternating current motor; demonstrating the rotating magnetic field.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    From page 97: "These cells show the extraordinary property which selenium possesses of changing its electrical resistance under the influence of light."

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    "Parsons' latest improved design, for controlling incandescent lighting circuits, and for demonstrating the laws of series and parallel combinations."

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Instruments for measuring both voltage and amperes of direct electric current.

    • Part of Catalog K: Physical Apparatus for Universities and Colleges
    • 1912-May

    Wave apparatuses for the study of transverse and longitudinal waves.