Patent Model - Improvement in Heliometers

Maker and role
Conrad Risch, Patentee
Production date
Apr 28 1868
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Object detail

Wood, brass, steel
12 x 10 5/8 x 12" (30.5 x 27 x 30.5cm)
Risch's patented invention "relates to a new apparatus, which is a perfect sun-dial for all latitudes, and by which the time of the day can be ascertained with exactness, by minutes and seconds; also the degree of latitude above which the sun stands perpendicular during any one day; also, the date and length of day, as well as the time of sunrise and sunset." (Patent Number 77,324)
Object number
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