[ 2 $7 ] 



A Letter from Mr. Hey to Dr. Priestley, con- 

 cerning the Effects of fixed Air applied by way 

 ofClyiter, 



Leeds, Feb. 15th, 1772. 

 Reverend Sir, 



Having lately experienced the good effects of 

 fixed air in a putrid fever, applied in a manner, I 

 believe, not heretofore made ufe of, I thought it 

 proper to inform you of the agreeable event, as 

 the method of applying this powerful corrector 

 of putrefaction took its rife principally from your 

 observations and experiments on factitious air ; 

 and now, at your requeit, I fend the particulars 

 of the cafe 1 mentioned to you, as far as concerns, 

 the administration of this remedy. 



January 8, 1772, Mr. Lightbowne, a young 

 gentleman who lives with me, was feized with a 

 fever, which, after continuing about ten days, 

 began to be attended with thofe fymptoms that 

 indicate a putrefcent ftate of the fluids. 



1 8th, His tongue was black in the morning 

 when I firfl vifited him, but the blacknefs went 

 off in the day-time upon drinking : He had begun 

 to doze much the preceding day, and now he took 

 little notice of thofe that were about him : His 

 belly was loofe, and had been fo for fome days^ 

 his pulfe beat no ftrokes in a minute, and was 

 rather low : he was ordered to take twenty five 

 grains of Peruvian bark with five of tormentill 

 root in powder every four hours, and to ufe red 

 "wine and water cold as his common drink. 



Vol, LXI1. L, 1 19th* 



