OF FOODS UPON THE EESPIEATION. 
733 
6. The Tea Series. 
'I he members of this class are nearly all powerful respiratory excitants. The inquiries 
have been very varied and extensive. The tea was exceedingly good and pure. 
Tm.—April 2 (6 exps.), Plate XXXVI. fig. 32. 100 grs. of black tea gave to myself 
and Mr. Moul a maximum increase of carbonic acid of -87 gr. and 1-72 gr. per minute 
in 50 and 71 minutes. The average increase was -73 gr. and 1 gr. per minute. The 
quantity of air was increased 71 cubic inches and 68 cubic inches per minute, and the 
depth of inspiration 4 cubic inches in each of us. The rate of respiration was in- 
creased and that of pulsation decreased, except at the first observation, after the tea had 
been taken. 
April 7 (5 exps.), April 17 (5 exps.), Plate XXXVI. fig. 31, April 19 (6 exps.).— 50 grs. 
of black tea gave the following results to myself, Mr. Moul, Mr. Moul’s son (set. 16), and 
Professor Fkaxkland on different occasions: — a maximum increase of carbonic acid of 
1-08 gr. in myself; 1-38 gr., 2-58 grs. and 1-6 gr. in Mr. Moul ; 2 grs. in Mr. Moul’s son, and 
•69 gr. per minute in Professor Frankland. The maximum increase in the quantity of air 
inspired was in the same order, — 34 cubic inches, 39 cubic inches, 50 cubic inches, 72 cubic 
inches, 95 cubic inches, 26 cubic inches per minute. My rate of pulsation was lessened, 
and that of respiration was scarcely changed. The rate of both was lessened in Mr. Moul, 
whilst in his son that of respiration was increased and of pulsation decreased. 
May 26 (7 exps.). — 100 grs. of green tea, drunk when cold, gave to myself and 
Mr. Moul maxima of increase of carbonic acid of 'Ogr. and 2-58 grs. per minute, with 
average increase of -44 gr. and 1-57 gr. per minute. The quantity of air was not 
increased in myself, but it was increased 120 cubic inches per minute in Mr. Moul. 
The rate of respiration declined so much as 1’2 and 2 per minute, and in Mr. Moul that 
of pulsation also slightly declined. The depth of inspiration was increased 3 cubic 
inches and 10 cubic inches. 
August 26 (4 exps.). — The same quantity given to Mr. Hoffman, Surgeon to the 
Margate Infirmary, caused a maximum increase of ‘64 gr. of carbonic acid per minute 
and 50 cubic inches of air per minute in one hour. The pulsation declined after the 
first observation. 
May 24 (10 exps.), Plate XXXVI. fig. 35. — 25 grs. of green tea, drunk when cold 
several hours after it had been infused, and repeated every quarter of an hour for five 
times, gave Mr. Moul an average increase in carbonic acid of 1-2 gr., and a maximum of 
1‘8 gr. per minute. The maximum increase in the quantity of air inspired was 66 cubic 
inches per minute after the fifth dose. The total increase of carbonic acid, as deduced 
from the ten observations, was 193 grs. ; but at the end of the inquiry, in two hours and 
thirty-four minutes, there was still an increase of "9 gr. of carbonic acid and 36 cubic 
inches of air per minute. The rate of respiration declined 1'6 per minute, whilst that 
of pulsation was scarcely changed. The depth of inspiration was increased 10-6 cubic 
inches, and was much the greatest after the fourth dose. 
June 8 (13 exps.), fig. 34. — Mr. Moul took 150 grs. of black tea infused in one pint of 
