ON SWEAT AND ITS ACID. 63 



the water, green crystals collected round the cube; the parti- General illus- 



, ' , , s trations and 



cles not being capable of penetrating it. application*. 



By a multiplication of such instances the electrical power 

 of transference may be easily conceived to apply to the ex-* 

 planation of some oi the principal and most mysterious facts 

 in geology. 



And by imagining a scale of feeble powers, it would be easy 

 to account for the association of the insoluble metallic and 

 earthy compounds containing acids. 



Natural electricity has hitherto been little investigated, ex- 

 cept in the case of- its evident and powerful concentration in 

 the atmosphere. 



Its slow and silent operations in every part of the surface 

 will probably be found more immediately and importantly 

 connected with the order and economy oi nature; and inves- 

 tigations on this subject can hardly fail to enlighten our 

 philosophical systems of the Earth; and may possibly place 

 new powers within our reach. 



Explanation of the Figures, 



PL I. Fig. 1, Represents the agate cups, mentioned VoL 

 XVIII, p. 323. 



Frg. 2, Represents the gold cones, page 325. 



Fig. 3, Represents the glass tubes, and their attached 

 apparatus, page 337- , 



Fig. 4, Represents the two glass tubes, with the interme- 

 diate vessel, page 338. 



In all the figures A B denote the wires, rendered one posi- 

 tively, the other negatively electrical; and C the connecting 

 pieces of moistened amianthus. 



- *-■■ '- -■ ■■■:.'■■■ ■ ■■■ — , — - 



XIII. 



Memoir on the Analysis of the Sweat, the Acid it contains, and 

 the Acids of the Urine and Milk; read to the National In- 

 fiitute by Mr. Thenard*. 



F we examine the principal fluids of the animal economy, Animal flunk 

 hat some are alkaline, and the others acid. 



Annales de Chimie, vol. L1X, p. 262, Sept. 1S06. 



we find, that some are alkaline, and the others acid. To the ? Cid °' alku 



' line. 



first 



