[ 2 57 ] 
A Letter from Mr. Hey to Dr. Priestley, con- 
cerning the Effects of fixed Air applied by way 
of Clyffer. 
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 corre&or 
of putrefadtion took its rife principally from your 
observations and experiments on factitious air ; 
and now, at your requeft, I fend the particulars 
of the cafe 1 mentioned to you, as far as concerns 
the adminiftration of this remedy. 
January 8, 1772, Mr. Lightbowne, a young 
gentleman who lives with me, was Seized with a 
fever, which, after continuing about ten days, 
began to be attended with thole fymptoms that 
indicate a putrefcent flate of the fluids. 
1 8th, His tongue was black in the morning 
when I fir ft vilited 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 110 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. LXII. L l 19th, 
