Our boys; what they can do and how to do it (1893)
Stoddart, William, [from old catalog] comp · New York, Hunt & Eaton; Cincinnati, Cranston & Curts · leaf 29
til it is about one eighth of an inchdeep in the bottom of the cup, as seen at h in Fig. 2. This method has several advantages besides permanence.It keeps the zinc plate constantly amalgamated, which is animportant consideration. It enables us to use the entire plate,as the upper end simply drops… … ^9 ^ connection scraps of zinc in any shape may be used in anemergency by simply dropping them into the cup. There are two excellent methods of connecting the carbonplate with a conducting wire. In either case the upper end ofthe plate must first be soaked in hot beeswax and resin. Thisfills up the…
Handicraft · Amusements · Sports
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