6o On the various F.ff'eBs produced by 



fufed medicine and food, and was obliged to be drenched irt 

 order to get either down : an emetic and cathartic being pre- 

 iniicd, they ^vere all put upon the fame plan ; that is, were 

 to take, every three hours, two-thirds of a glafs of frefh por- 

 ter, with two table fpoonfuls of yeft and the juice of half a 

 lemon ; and the food at intervals was the white of eggs, 

 which Dr. Thornton judged of all things were leaft fubjeft 

 to putrify *, beat up with fome fugar and water, and, as it 

 was the commencement of fummer, (trawbcrries were alfo 

 ordered ; and without any farther medicine from the apo- 

 thecary than the emetic and purge, although the woman 

 was at firft obliged to be drenched, yet fhe and her whole 

 family recovered, and this very rapidly, 

 ^ Among the poor in St. Giles's nothing is adminiftered by 

 Dr. Thornton, after cleanfing the primse vise, than two table 

 fpoonfuls of yeft in fome porter every two hours; and out of 

 above forty cafes not one has died under this treatment. 



XIII. On the various KffcLils produced hy the Nature, Com' 

 prcUion, and Ve'ocity of the Air ujed in the Blaji-Furnace. 

 By Mr. David Mushet, of the Clyde Iron-Works. 

 Communicated by the Author. 



HEN it is confidered that in the fmelting operation 

 the reduction of immenfe quantities of materials is effefted 

 by a comprelfed current of air impelled by the whole power 

 of a blowing machine, the confequences of the change of 

 air, cither in quantity or quality, muft be very obvious : 

 when, farther, we contemplate the metal called into exiftence 

 by means of combuftion thus excited ; when v/e confider iron 

 as having the moft powerful affinity for the bafe of that part 

 of the air which maintains combullion ; and when we view 

 the debafcd ftate to which the metal is reduced by coming 

 into improper conta<Sl with it, we muft conclude, that the 

 application of biaft in the manufacturing of iron calls for the 



* \Vc know that eggs are kept for a great length of time, and the 

 wlii'c, even under the heat of the hen's body, does not putrify, and it 

 ferves as milk lo t:;e embryo in the cg^. 



moft 



