Antique Print-PNEUMATICS-SCIENCE-AIR-HYGROMETER-BAROMETER-Lowry-Howard-1788

This print shows a view on a collection of scientific instruments used in the 18th century to study the properties of air and liquids. Hydrometers: Instruments for measuring the density or specific gravity of liquids (shown above, such as Fig. 25 and 26). Hygrometers: Devices for measuring humidity (the middle part). You will see different mechanical designs, including types that worked with strings or hairs that expand with moisture. Barometers and Pressure Gauges: Various air pressure measuring devices, including a circular scale at the bottom (Fig. 42) indicating the states “Very Dry”, “Settled Fair”, “Changeable”, “Rain” and “Much Rain”.

Made by Wilson Lowry after Howard.

Medium: Etching / engraving on handlaid (verge) paper.

Sheet size: 26 x 42 cm (10.24 x 16.54 inch). Image size: 21 x 35.2 cm. (8.27 x 13.86 inch).

Condition: good, given age. Brown edges. General age-related toning and/or occasional minor defects from handling. Please study scan carefully.

PNEUMATICS-SCIENCE-AIR-LIQUIDS-HYGROMETER-BAROMETER-PRESSURE-WEATHER | RBOS-T43-LARGE

BACKGROUND INFORMATION

This attractive print was published in the New Royal Cyclopaedia and Encyclopaedia” (ook bekend als The New Royal Encyclopaedia Londinensis), samengesteld door George Selby Howard, 1788. Published by Alexander Hogg in Londen.