Plainsboro resident Henry Jeffers, Sr., who worked for Walker-Gordon Laboratory Company, held the patent for this unique device. It was used to determine a cow's nutritional feeding requirements.
Collection
Walker-Gordon and Elsie the Cow Collection
Made/Created
Date made
1907
Place
* Untyped Place
Plainsboro, NJ
Inscription/Signature/Marks
Transcription
The Jeffers Calculator Patent Applied for by Henry W Jeffers Plainsboro NJ
