The little gold mine. Conklin's handy manual of the mechanical arts and house plans .. (1889)
Conklin, [George W.] [from old catalog] · Chicago, Laird & Lee · leaf 331
Fig. 10. Fig. 9.must be operated in a powerpress, or one specially41 de-signed for the purpose, andthey are more convenientlyworked in an inclined thana horizontal press, as thework will then fall off by theforce of its own gravity. Fig. 10 is a die of thesame class, but with anotheroperation…
Industrial arts · Workshop recipes · Architectural drawing
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