On Pnaimatic Medians. -299 



felves fometimes in vertical itrata, or at leaft Strata very much 

 inclined, and with {harp naked peaks like thofe of fome pri- 

 mitive mountains i 



10. Whether, in the fame fecondary mountain, there are 

 found itrata of different kinds of Hones oftener than in the 

 primitive ? 



11. Whether, in fecondary mountains, on the other hand, 

 each ftone is not generally fimple, and not compound as in 

 the primitive ? 



12. To make rcfearches refpecYmg the origin and anti- 

 quity of mountains of gypium, and their relation with 

 mountains of fait and fait fprings. 



[To be continued,] 



XII I. Fourth Communication from, Dr. Thornt on, Phy- 

 (ician to the General Difpenfaiy, relative to Pneumatic Me- 

 dicine. 



Letter to Dr. Thornton. 

 Dear Sir, Dulwich Common, 



[ RETURN you many thanks for your kind attention? to 

 Mrs.R. Your method of treatment, under Providence, has cer- 

 tainly performed a wonderful cure. My wife had not inhaled 

 the air three times before I perceived a very great alteration, 

 both in regard to appetite and j'pirits ; her Jlrength, in a 

 week, was alio fo much rcftored that (he could with eafe 

 walk five miles, when before it was quite a fatigue to walk 

 one. I can with pleafure likewife add, that what alarmed 

 us both — the coldnefs of her extremities, and blacknefs 

 under the finger-nails— are both entirely removed, and her 

 nails now appear healthy. As my wife has not enjoyed fuch 

 good health for feveral years as fhe has experienced thefe 

 laft fix months, Mrs.R. unites with me in grateful acknow- 

 ledgements to you. 



And I remain, dear fir, your'? refpeafully, 



M. ROBINSON. 



