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    • 1995

    The "Periodic Round Table" looks like a multi-layered cake. There are eight wooden layers that sit on top of one another and can be rotated. Layers are divided into chemical elements with engraved element name and…

    • 1785

    Copperplate engraving illustrates the chemical apparatus and balloons used for hydrogen generation. In figure four, a hot air balloon and basket support a passenger.

    This volume by Tiberius Cavallo is considered one of…

    • 1785

    Copperplate engraving illustrates the chemical apparatus and balloons used for hydrogen generation.

    This volume by Tiberius Cavallo is considered one of the earliest and best works on aerostation published in…

    • 1785

    This volume by Tiberius Cavallo is considered one of the earliest and best works on aerostation published in eighteenth century England. Cavallo's pioneering studies in aeronautics outlined within this work include how…

    • 1660

    Folding copperplate engraving illustrating sixteen figures including the pneumatical engine and components used in pneumatic experiments leading to the discovery of Boyle's law.

    Forty-three experiments are detailed…

    • 1660

    Forty-three experiments are detailed within this work, including the physical and chemical properties of air proving it has weight along with determining that a vacuum restricts the transmission of sound as well as the…

    • circa 1520 – 1540

    Found in its original plain binding of parchment, this work was most likely compiled by a practitioner of alchemy and medicine. Containing a handwritten copy of Liber lucis by John of Rupescissa (Johannes de Rupescissa)…

    • 1822

    Cover and title page digitized from seminal work responsible for exposing dangerous adulterations to foods and beverages. Food and drug purity legislation followed later in the nineteenth century.

    Cover features…

    • 1972

    Developed in 1972, the HP-35 was Hewlett Packard's first pocket calculator and the first pocket calculator ever to have transcendental functions. Twenty HP engineers spent two years and approximately $1 million…

    • 2018

    Modern reproduction of the first electric battery invented by Alessandro Volta in 1800. Base and top are wooden. Between the base and top rests a stack or pile of 46 copper-zinc cells. Electrodes used to tranfer the…

    • 1859

    Digitized in entirety, this first English edition of the German Das Mineralreich in Bildern (Stuttgart, 1858) contains 24 lithographed plates with one chromolithograph and 22 hand-colored illustrations of 288 minerals,…

    • 1874

    Chapters cover food types commonly adulterated through the use of additives, with some additives being non-food items such as plaster of Paris, lead and brick dust. End of book features plate illustrations of common…

    • 1941

    Illustrated throughout, this booklet includes sections on lung irritants, blister and tear gases, irritant smokes, incendiaries, screening smokes, systemic poisons and decontamination stations.

    • Pl. XIII
    • 1872 (Published)

    Lorenzo Respighi (1824-1889) was the director of the University Observatory at the Campidoglio at Rome. Starting in October of 1869 he observed daily the entire limb of the sun recording prominences and other phenomena.…

    • Pl. XII
    • 1872 (Published)

    Prominences represented in their natural colors, as seen through a large telescope when the slit of the spectroscope was open wide and directed on to the red C-line. These prominences are characteristic of the a…

    • Pl. XI
    • 1872 (Published)

    Prominences represented in their natural colors, as seen through a large telescope when the slit of the spectroscope was open wide and directed on to the red C-line. These prominences are characteristic of the an…

    • Fig. 135
    • 1872 (Published)

    An illustration of a man using Lockyer's telespectroscope. Sir Joseph Norman Lockyer (1836-1920), designed this instrument in order to observe the spectra of the prominences in full sunlight. Lockyer is best known for…

    • Pl. X
    • 1872 (Published)

    From a photograph taken of a solar eclipse observed from Syracuse, Sicily on 22 December 1870.
    From text: "The photograph taken by Mr. Brothers is very valuable, since it shows the halo extending towards the…