"This unique piece of apparatus uses Lissajous figures to show that the ratio of the frequency ratios in a diatonic scale are ratios of small numbers. On the side is an air-driven vibrating reed with a small mirror attached to its free end....
Galvanometer; Scientific apparatus and instruments
A galvanometer is an instrument used to measure the presence, direction, and strength of small electric currents in a conductor. A magnetic needle is deflected by the presence of an electric current in a nearby conductor. The needle turns at right...
A hydrometer measures the specific gravity of a liquid relative to water. Nicolson's hydrometer differs from other hydrometers in being totally submerged in use.
Scientific apparatus and instruments; Simple machines; Archimedean screw
A simple mechanical device credited to Archimedes. When the lower end of the screw is placed in water, turning the device raises water to the top. This principle has various applications for drainage and irrigation, but the instrument can also be...
Scientific apparatus and instruments; Camera lucida;
An artist's aid for drawing, the camera Lucida was a portable device that was used to reproduce visual images on to paper. An adjustable prism mounted on the end of a supporting arm reflects the surrounding light and produces the image onto the...
Fishing; Los Gatos (Calif.); Los Gatos Creek; Nature; People; Postcards; Rivers; Santa Clara County (Calif.)--History; Trout;
Artist's color rendition of a man trout fishing in Los Gatos Creek, California, 1906. Note beneath picture. On verso of postcard: Addressed to "Miss Charlotte Stolt, San Francisco, Cal." Postmarked "1906 Feb 28."
Agriculture; Celebrations--California--San Jose; Orchards; Postcards; San Jose (Calif.)--Electric Light Tower; Santa Clara County (Calif.)--History; Technology;
Artist's color rendition of the San Jose N.S.G.W. Celebration Sept. 9th 10th 11th, 1909. Includes Electric Light Tower and agricultural scene. On verso of postcard: Addressed to "Miss Irene Bugbee, Stockton, Calif." Postmarked "Jul...
Clean rooms; Electronic industries; Intel microprocessors; Manufacturing; People; Photographs; Santa Clara (Calif.); Santa Clara County (Calif.)--History; Semiconductor wafers; Technicians; Technology;
Color photograph of a basic container housing 300mm wafers in the automated fabrication (Fab) process.
Clean rooms; Electronic industries; Manufacturing; People; Photographs; Santa Clara (Calif.); Santa Clara County (Calif.)--History; Technicians; Technology;
Color photograph of a clean room floor. Clean air continuously flows from every pore of the ceiling and through the holes in the floor of the fabrication (Fab) plant. All of the air in the clean room or fab is replaced several times every minute.
