~ tracking down this book ~
only cover on file
A Treatise on the Teeth of Wheels
“Demonstrating the Best Forms which Can be Given to Them for the Purposes of Machinery”
1837248 pages~4½h read
only cover on file
A Treatise on the Teeth of Wheels
“Demonstrating the Best Forms which Can be Given to Them for the Purposes of Machinery”
1837248 pages~4½h read
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