Go to Google Books and do a search on F.R. Corothers. The quote marks are important. One example of a citation is
shown on the link below.
https://www.google.com/books/edition/Specifications_and_Drawings_of_Patents_I/J8o6AQAAMAAJ?
hl=en&gbpv=1&dq=F.R.+Crothers&pg=PA964&printsec=frontcover
Various other websites have information on Finley R Corothers who was born in Indianapolis, IN in 1829 an died in 1912.
https://www.findagrave.com/memorial/117878777/finley-r-crothers
https://www.cardcow.com/179693/sparta-plow-works-advertising/
shown on the link below.
https://www.google.com/books/edition/Specifications_and_Drawings_of_Patents_I/J8o6AQAAMAAJ?
hl=en&gbpv=1&dq=F.R.+Crothers&pg=PA964&printsec=frontcover
Various other websites have information on Finley R Corothers who was born in Indianapolis, IN in 1829 an died in 1912.
https://www.findagrave.com/memorial/117878777/finley-r-crothers
https://www.cardcow.com/179693/sparta-plow-works-advertising/