Patent Model - Improvement in Incubators
Maker and role
James Campbell, Patentee
Jul 08 1879
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Wood, iron, brass
8 x 7 3/4 x 5 1/2" (20.3 x 19.7 x 14cm)
Campbell's patent furnishes "an improved device for hatching eggs artificially, which shall be so constructed that the burning of the lamp may be regulated automatically, so as to keep the eggs at a uniform temperature, and which shall be properly ventilated." (Patent Number 217,333)
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