St Nicholas [serial] . carbon is used in place ofthe copper, a solution of sal ammoniac may beused instead of the sulphuric acid. The sulphuricacid should be used with great care. When notdiluted, it will injure flesh or clothing with whichit conies in contact. The crowfoot battery (Fig. 2), so calledfrom the shape of the zinc which is suspendedfrom the top of the jar, with the solution justcovering it, is almost exactly the same kind ofbattery as the one made with the tumbler and thestrips of zinc and copper. The copper of thisbattery you will see spread out on the bottom ofthe jar. The small
St Nicholas [serial] . carbon is used in place ofthe copper, a solution of sal ammoniac may beused instead of the sulphuric acid. The sulphuricacid should be used with great care. When notdiluted, it will injure flesh or clothing with whichit conies in contact. The crowfoot battery (Fig. 2), so calledfrom the shape of the zinc which is suspendedfrom the top of the jar, with the solution justcovering it, is almost exactly the same kind ofbattery as the one made with the tumbler and thestrips of zinc and copper. The copper of thisbattery you will see spread out on the bottom ofthe jar. The small, pebble-like substance aroundit is blue-stone —sulphate of copper. The solutionpoured in is merely clean water. Sometimes sul-phate of zinc is added to hasten the action. Theliquid soon dissolves the blue-stone, which suppliesthe sulphuric acid necessary to attack the zincsuspended in the top of the fluid. By using this it can get to the copper plate. There is a sort oftrade, so to speak, in which the hydrogen atoms.
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Keywords: ., bookcentury1800, bookdecade1870, bookidstnicholasserial371dodg
