DE. E. SMITH OH THE ACTIOH 
722 
bonic acid in 25 minutes, and after the expiration of 70 mmutes the increase was still 
1-42 gr. per minute. The pulse was fuller and more frequent. 
May 10 (13 exps.), Plate XXXV. fig. 26.— | an oz. of sugar, taken at inteiwals of 
one hour, gave me a maximum increase of carbonic acid, on each occasion, of 1-3 gr., 
and of air of 26 cubic inches, 26 cubic inches, and 11 cubic mches per mmute over the 
first basis quantity. The depth of inspiration was increased on each occasion, and the 
pulsation was somewhat decreased. On the second occasion the sugar was eaten dry ; 
and as an uneasy sensation followed, water was drunk in one hour aftei-wards, and was 
followed by a renewed increase in the carbonic acid evolved. 
On another occasion. May 18(9 exps.), fig. 24, | an oz. of sugar, with 3 oz. of water, 
taken twice, with an interval of 1 hour, gave me a maximum increase in carbonic acid 
of 2T8 grs. per minute in 23 mmutes in the first, and -52 gr. per minute in 23^ mmutes 
in the second experiment, whilst in Mr. Moul the increase was -86 gr. and 2T4 grs. per 
minute in the same period. The maximum increase in the quantity of aix mspmed at 
the same period was 51 cubic inches and 29 cubic inches per minute in myseK, and 
58 cubic inches and 52 cubic inches per minute in Mr. Moul. The depth of insphation 
was considerably increased in both persons. 
May 21 (19 exps.).“500 grs. of white sugar, dissolved in 6 oz. of cold water, were 
taken, and the whole of the carbonic acid evolved afterwards was collected and weighed 
every half hour. In the first half hour the increase was 1-57 gr. per minute, and m the 
second, half hour -68 gr. per minute; whilst the quantity evolved at 95 minutes, when 
the inquiry ended, was T2 gr. per minute above the basis quantity. The mcrease in 
the carbonic acid, in the first hour, was thus 67-6 grs. The quantity of ah insphed was 
registered every 6 minutes. The maximum increase was 64 cubic inches m 3o mmutes. 
and the quantity was reduced to the basis in 86 minutes. The average increase was 
19-3 cubic inches per minute in the first half horn', 30-6 cubic mches per minute in the 
second half hour, and 8-3 cubic inches per minute in the third half hour. The rate ot 
respiration was scarcely changed, and hence the depth of inspiration varied as the 
quantity of air inspired. 
Cane-sugar and Fm^yar.— June 29 (7 exps.), Plate XXXV. fig. 26. 750 grs. of 
white sugar, with 6 drachms of good vinegar and 7 oz. of water, gave a maximum increase 
per minute of carbonic acid of 3-3 grs. in 20 minutes. The average increase in 1| hour 
was 1-24 gr. per minute; the maximum increase in the air inspired was 79 cubic inches 
in 20 minutes, and in the depth of inspiration 4T cubic inches. The rate of resphation 
was increased slightly, and that of pulsation 5 per minute. 
October 4 (6 exps.).— The repetition of this experiment in October (but with rai^ 
sugar) gave a less increase, and at a later peiiod. 
June 24 (7 exps.).— With 30 grs. of citric acid instead of the vinegar, the maximum 
increase in carbonic acid in myself was 1-74 gr., and in Mr. Moul 2-26 grs. per minute. 
The increase of air inspired was 47 cubic inches and 20 cubic inches pei mmute. 
July 5 (8 exps.), Plate XXXV. fig. 27.— 750 grs. of white sugar, with 40 n of 
