Hare on the Galvanic Dejlagjator, ^c. 347 



Table of the whole, reduced to centessimal proportions. 



Art. XX. — Letter to the Editor, on some improved forms 

 of the Galvanic Deflagrator ; on the superiority of its de- 

 flagrating power ', and on its anomalous polarity, wheth- 

 er tested by water, or the magnetic needle ; by Professor 

 Robert Hare, M. D., &c. 



After I had discovered that the deflagrating power, of 

 a series of galvanic pairs, was surprisingly increased, by 

 their simultaneous exposure, after due repose, to the acid 

 various modes suggested themselves of accomplishing this 

 object. In the apparatus which I sent you, the coils, be- 

 ing all suspended to two beams, could be lowered into 

 troughs, containing the acid. In another apparatus, of 

 which 1 afterwards gave you an account, with an engraving 

 for your Journal, the troughs containing the acid, were 

 made to rise, so that all the plates might be immersed at 

 once. A better mode has since occurred to me. Two 

 troughs are joined lengthwise, edge to edge, so that when 

 the sides of the one are vertical, those of the other must be 

 horizontal. Hence, 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 motion, must flow back 



