SicT. VL] Hydrology. 2.57 



these may be added the hydrological Inquiries of 

 Gren, Westrumb, and Kirwan, ^vhich are highly 

 valuable, — especially those of the last named gentle- 

 man, who, in a tract singularly comprehensive, and 

 abounding with instruction, has given a rich 

 amount of principle, experiment, and authority, on 

 this interesting subject*. By the labours of these 

 and many other philosophers, discoveries have 

 been made concerning the composition and medi- 

 cal powers of mineral waters, in almost every part 

 of the world, extremeiy useful to the interests both 

 of science and humanity. 



* Essay on the Analysis of Mineral Waters, by Richard Kir- 

 wan, es^. F.R.S. &c. 8vo. I/99. 



Vol. I. 



