David Brewster, creator of Brewster's Law, patented this device in 1817. It consisted of a long, hollow tube containing two glass mirrors running along the length of the tube and separated from each other at an angle of 60 degrees. Where mirrors...
Electric discharges; X-ray tubes; Scientific apparatus and instruments
This instrument appears to be an early type of vacuum discharge tube or x-ray tube. The glass tube contains metal electrodes that have been sealed and from which the air has been removed by a vacuum system. Physical Description: Glass bulb with...
Electric discharges; Scientific apparatus and instruments
When connected to a power source, a bright electric spark would flash between the two ends of the two outer posts. The middle glass post is made of photo gray glass (yellow tinted glass), which would have glowed. This instrument is visible in early...
Scientific apparatus and instruments; Santa Clara University (Calif.); Electric discharges;
When connected to a power source, a bright electric spark would flash between the two ends of the two outer posts. The middle glass post is made of photo gray glass (yellow tinted glass), which would have glowed. This instrument is visible in early...
Glass plate negative of a stagecoach drawn by four horses on a dirt road with the stagecoach driver at the reins. Trees line the road at right, and the acequia can be seen at the bottom right corner.
The Kinnersley's Thermometer was an apparatus designed to demonstrate the heating power of an electric spark by showing the expansion of air when an electric spark is passed through it. Physical Description: Glass tube with brass base and top,...
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...
Scientific apparatus and instruments; Santa Clara University (Calif.)
David Brewster, creator of Brewster's Law, patented this device in 1817. It consisted of a long, hollow tube containing two glass mirrors running along the length of the tube and separated from each other at an angle of 60 degrees. Where mirrors...
Automobiles; People; Postcards; Public buildings; San Jose City Hall (San Jose, Calif.); Santa Clara County (Calif.)--History; Transportation; Urban life;
Front of postcard shows San Jose City Hall on a beautiful day in 1963. On verso of postcard, "City Hall, San Jose, California. This magnificent steel and glass structure has a curved design which has won nationwide acclaim. Set amid pleasant...
New Almaden Mines; Hardware;Mining equipment; Receipts
Duplicate receipt for purchase of 6 glass tubes by Quicksilver Mining Co. from Conroy & O'Connor, Importers of Hardware, Iron, Steel, and Other Metals, San Francisco, Nov. 30, 1864, (No.13 on verso)
The Oersted Piezometer was used to determine the coefficient of the compressibility of liquids. Gases would have been pumped into the chamber through the funnel at the top. The pressure of the gases would have been measured via the water barometer...
Scientific apparatus and instruments; Santa Clara University (Calif.); Electric discharges; X-ray tubes;
This instrument appears to be an early type of vacuum discharge tube or x-ray tube. The glass tube contains metal electrodes that have been sealed and from which the air has been removed by a vacuum system.
