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Automatic Switch
Patent for an automatic switch for street railways.
Date:
November 30, 1909
Creator:
Godoy, Jose Ma
System:
The Portal to Texas History
Clinical Thermometer.
Patent for a new and improved thermometer. This design has "[u]pon the body of the instrument a scale, preferably equivalent to the centigrade . . . in which the zero-sign is placed at the normal temperature of the body, each degree being divided into five or ten parts according to the size of the instrument and reading supernormal and subnormal degrees" (lines 20-26).
Date:
June 11, 1889
Creator:
Hunstock, Robert H. & Chávez, Emigdio
System:
The Portal to Texas History