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 125
under certaincircumstances, set up a--, galvanic and corrosive ■^ ^^ ^ action, it is advisable to wholly detach the scale. This is easily done with ironplates, but steel plates cannot be completely cleaned of mag-netic oxide by the usual mechanical methods. An excellentand effective method is that… … Fig. I.
Industrial arts · Workshop recipes · Architectural drawing
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