288 Dr. Hare’s Description of Voltaic Series, &c. 
printed pages, abstracted from the Transactions of our American 
Philosophical Society, Vol. V, Part 3, lately published. 
* Galvanic Deflagrator of one hundred pairs, of fourteen inches 
by eight. 
Fig. 1. 
Fig. 1 represents a voltaic series, upon the plan of the trough of 
Cruickshank, associated with another trough destitute of plates, and 
of a capacity sufficient to hold all the acid necessary for an ample 
charge. The trough containing the series is joined to the other 
lengthwise, edge to edge, so that when the sides of the one are ver- 
tical, those of the other must be horizontal. The advantage of this 
arrangement is, that by a partial revolution of the two troughs, thus 
united, upon pivots which support them at the ends, any fluid which 
may be in one trough must flow into the other; and, reversing the 
movement, must flow back again. The galvanic series being placed 
in one of the troughs, ¥ acid in the other, by a movement “such as 
above described, the plates may all be instantaneously subjected to 
the acid, or relieved from it. The pivots are made of iron, coated 
with brass or copper, as less liable to oxidizement. A metallic com- 
munication is made between the coating of the pivots, and the gal- 
vanic series within. In order to produce a connexion between one 
recipient of this descfiption and another, it is only necessary to allow 
8 pivot of each trough to revolve on one of the two ends of a strap 
a sheet copper. ‘To connect with the termination of the series, the 
en rods, to which are soldered the vices, or spring forceps, for 
pare the substances to be exposed to the deflagrating power, n€ 
