75° 
CHEMISTR Y OF RESPIRATION. 
Volume of 
Residual Air 
in C.c. 
1,771 
672-4 
1,640 
1,230 ] 
to 
1,640 J 
19,800 
10,547 
to 
13.1S9 
1,885 
400 1 
to • 
800 J 
500 
1,231 max. ) 
6-10 min. - 
981 mean J 
1,250 max. i 
440 min. ,- 
796 mean J 
526 max. ^ 
347 min. Y 
47S mean J 
Method. 
Observer. 
Remarks. 
On corpse. Goodwyn 
On living subject. H. Davy. 
On corpse. 
On living subject. 
Allen and Pepys. 
Hutchinson. 4 
Xeupauer. 5 
Waldenburg. 7 
Gad. 8 
Pfliiger 9 
On nine corpses. 
Koclis. 10 
f Hermann and 
^ Jacobson. 11 
On living subjects. f Hermann and 
^ Berenstein. 12 
sixteen males. 
On living subjects, 
three females. 
( Hermann and 
\ Berenstein. 12 
Mean of seven experi- 
ments. 
On one subject ; hydro- 
gen method used. 
Method defective, re- 
sults too high. 6 
Method defective, re- 
sults too high. 6 
Pneumonometer used. 
Hydrogen method used. 
Vital capacity is the term given by Hutchinson to the volume 
of air which can be expelled from the thorax by the most forcible 
expiration, following the deepest possible inspiration. The different 
values assigned to this volume of air are shown in the following 
table : 13 — 
1 "Connexion of Life with Respiration," London, 1788, p. 25. 
2 "Researches concerning Nitrous Oxide," London, 1800, p. 399. 
3 PhU. Trans., London, 1809, pp. 404, 410, 42S. 
4 Article "Thorax," Todd's " Cyclopaedia of Anatomy and Physiology," vol. iv. p. 
1066. 
5 Deutschc.s Arch. f. Min. Med., Leipzig, 1879, Bd. xxiii. S. 4S1. 
6 Zuntz, Hermanns "Handbuch," Bd. iv. Th. 2, S. 103. 
7 Ztschr.f. Min. Med., Berlin, 1879, Bd. i. S. 27. 
8 Tagebl. d. 54 Versamml. deutsch. Naturf. u. Acrzte in Salzburg, 1SS1, S. 117. 
*Arch.f. d. gcs. Physiol., Bonn, 1882, Bd. xxix. S. 244. 
10 Ztsrhr. f. Min. Med., Berlin, 1884, Bd. vii. S. 487. 
11 Arrh.f. d. gcs. Physiol., Bonn, 1888, Bd. xliii. S. 236, 440. 
12 Ibid., 1891, Bd. 1. S. 363. 
13 See also Julius Jeffreys, "Statics of the Human Chest," 1S43 ; Jackson, Am. Med. 
Examiner, 1851, p. 51 ; Radclyffe Hall, Trans. Prov. Med. and Surg. Assoc, London, 
1851. 
