OF FOODS UPON THE EESPIEATION. 
721 
average increase of carbonic acid of only -05 gr., and a maximum of -34 gr. per minute. 
There was a maximum decrease of 33 cubic inches in the air inspired, and a progressive 
decrease in the rate of both respiration and pulsation. On another occasion, June 28 
(7 exps.}, there was an average decrease of T1 gr. of carbonic acid per minute, with 
decrease in the rate of respiration and the quantity of air inspired. 
Olim (?«7.-~February 22 (8 exps.). 1 oz. of olive oil gave me an average increase of 
T1 gr. of carbonic acid, and a maximum of -55 gr. per minute. The quantity of air 
was not materially varied, but there was a diminution in the rate of respiration. 
Cod-Umr March 8 (6 exps.), Plate XXXV. fig. 1. 1 oz. of coddiver oil gave 
me an average decrease of carbonic acid of -27 gr., and a maximum decrease of 18 cubic 
inches of air per minute. The rate of respiration was decreased 1 per minute. On 
another occasion, June 24 (8 exps.), the average increase of carbonic acid was -03 gr. per 
minute, with a maximum decrease of 19 cubic inches in the inspired air. There was also 
a diminution in the rate of respiration, and an increase in that of pulsation. 
Hence — 
1. The general tendency of these fats was to lessen the above-mentioned respiratory 
changes, but the variation, whether above or below the basis, was not great. 
2. The rate of respiration was always lessened, whilst that of pulsation was usually 
increased. The quantity of aii- was lessened disproportionately to the carbonic acid, 
and thereby the proportion of the latter was increased. 
3. Both cod-liver oil and butter produced a soothing effect, whilst with all the fats the 
respiratory efforts were feeble, and in about 20 to 30 minutes there was a slight sense 
of oppression at the heart. 
I am of the class of persons who are fond of fat, whilst Mr. Moul dislikes it, 
3. Sugars. 
Sugar, unlike starch and fat, powerfully excites the respiratory changes. I have made 
a very extensiv e series of inquiries into its influence. 
Cane-sugar.~A^Yi\ 14 (6 exps.), Plate XXXV. fig. 23 ; May 1 (7 exps.), fig. 22. The 
maximum increase in the carbonic acid, due to oz. of white sugar dissolved in water, 
was 2-18 grs. per minute in myself on two occasions, and 1-5 gr. and 2-71 grs. per minute 
m Mr. Moul. There was an increase of about 1 gr. per minute within 10 minutes, and 
the maximum increase was attained in about 26 minutes, after which there was a rapid 
subsMence. The whole effect did not usually pass away in less than two hours. The 
maximum increase in the air inspired was per minute 74 cubic inches and 111 cubic 
inches in myself, and 30 cubic inches and 100 cubic inches in Mr. Moul. The rate of 
respiration was lessened, and the depth was increased 8 cubic inches and 6-6 cubic 
inches in myself, 8 cubic inches and 12-2 cubic inches in Mr. Moul. The rate of pulsa- 
tion was lessened. 
August 25 (6 exps.).— The effect upon Mr. Reid, Surgeon to the Canterbury Hospital, 
w o made an experiment for the first time, was a maximum increase of 1-9 gr. of car- 
MDCCCLIX. r. „ 
