Hare on the Galvanie Deflagr ator, &c. 347 
Table of the whole, reduced to centessimal proportions. 
¢ 
100 cub. inch.{10U0 cub, inch.(100 cub. inch.(100 cub.inch 
No. 1, Galen.|No. 2, Monte-! Montezuma; |No. 3,Onon- 
zuma. ago, 
Sp. gr. 1.0544.|Sp. gr. 1,0161,| Sp. gr. ——. |Sp.gr.1.0958 
Grains. Grains. Grains. Grains. 
Muriate of Soda, 2246.05 551.52 2016.33 3780.34 
Muriate of s,ime,| 13.15 21.07 40.75 12 
Mur.ot Magnesia 7.90 11.70 9.30 5.78 
Sul. of Lime, 55.26 36.30 118.20 106.93 
Carb. of Lime, 2.63 2.24 .60 5.78 
Silex, 1.30 
Solid matter, 2326.29. 4 622.93 2185.18 3921.85 
Arr. XX.—Letter to the Editor, on some improved forms 
of the Galvanic Deflagrator ; on the superiority of its de- 
flagrating power ; and on tts anomalous polarity, wheth- 
er tested by water, or the magnetic needle ; by Professor 
Rogert Hare, M. D., &c. 
ence. 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 
