Amateur mechanics ... a book for old and young who like to make things .. (1907)
Popular mechanics magazine, Chicago. [from old catalog] · Chicago, Popular mechanics · leaf 56
etweenthe two screws shown in Fig. 2. Theends of this small axle should be groundpointed and should turn easily in thecavities, as the sensitiveness of the in-strument depends on the ease withwhich this axle turns. After assembling the core as shownin Fig. 4, it should be filed a little atone end… … Fig. 2 Complete Ammeter and Details sary is that of leveling, which is ac-complished by turning the thumbscrew shown Wig. 1, until the hand points to 0 on the scale. First make a support. Fig. 2.bending a piece of sheet brass to theshape indicated and tapping for thescrews, C C. These should have…
Handicraft · Amusements
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-1146-592.webp)
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