1614.] emitted from the Lungs in Respiration. 335 



peated again on the 25th of November ; when on the third day the 

 quantity of carbonic acid was between sis and seven per cent. ; on 

 the fourth day, seven per cent. j on the fifth day, nine* per cent.; 

 on the sixth day, five per cent, ', and on the seventh d?.y, eight per 

 cent. 



3. Wine. — On the 8th of June a much greater quantity of wine 

 than usual was taken, and the next day the quantity of carbonic 

 acid was repeatedly found as low as above stated. On making the 

 experiment again with less wine, the quantity of carbonic acid was 

 considerably reduced, though not so much as before. These expe- 

 riments of Dr. F.'s differ from mine formerly stated, inasmuch as 

 his were not made till the day after the wine had been taken, 

 whereas mine were made immediately, and whilst its first effects 

 were present. ' 



4. Mercury. — The experiment with this metal was made upon a 

 man labouring under syphilis, and who had been taking it for some 

 Weeks for that disease. In consequence of the above-mentioned 

 great diminution observed by Dr. F., and which he noticed to me 

 in the letter just mentioned, I was induced to ask permission of Mr. 

 Astley Cooper to make the experiment upon some patient of his in 

 Guy's Hospital who might be fully under its effects. This he very 

 kindly consented to ; and the following are the details of my ob- 

 servations : — 



The subject of these experiments was a young man about 20 

 years of age. He had been under the effects of mercury for four 

 or five days. The first three experiments were made at the hospital, 

 the last three at my apartments after he had been dismissed from it 

 cured. There is a considerable diminution in the quantity of car- 

 bonic acid, but apparently not so great as in Dr. F.'s experiment. 

 Dr. F., however, did not ascertain the quantity of carbonic acid 



• This \% a striking illustration of Law II. stated in my former paper; namely, 

 when ilie quantil) bat !>< e.i raised above the siandarl, it is subsequently depicted 

 below it. 1 ti tid also (but th>- barometer mink from '• 9 is> to 89"50 on this day. I 

 had suspected t It ■-■, and wa- indued in consequence t'- • ••amine tin- meteorological 

 journal*,, ll is very singular, but in c \rr\ instance 1 have uniformly found auf 

 reoiarkable increase in ibe quantity of carbonic acid accompanied by a linking 

 baroniL'tii . Consult tbc tables in uty lust uud prcical paper. 



