MECHANICS OF RESPIRATION. 



485 



decrease in total ventilation of the lungs, results in an approximately- 

 constant volume per respiration but the data are so irregular that it is 

 difficult to discover any particular influence of the low diet upon the 

 volume per respiration, and one must infer that this remains practically- 

 unchanged. 



TIME RELATIONS OF MAXIMUM AND MINIMUM RESPIRATION VOLUMES. 



To indicate if there is any regularity- in the incidence of the maximum 

 volume per respiration and the time of the experiment and for similar 

 indications as to the appearance of the minimum, we present in table 

 112 the maximum, minimum, and average values for the volume per 

 respiration of Squad A. The average volumes per respiration ranged 

 from 520 c.c. with Can to 342 c.c. with Fre. (See footnote 2 of table 

 112.) These two men likewise represent the extremes in body-weight, 

 Can having a body-weight of 79.75 kg. and Fre a body-weight of 

 57.50 kg. 



Table 112. — Maximum, minimum, and average volume per respiration determined in experi- 

 ments with respiratory valve apparatus^ — Squad A, subjects post-absorptive arid in lying 

 position. 



Subject.' 



Bro: 



Maximum. . , 



Minimum . . . 



Average. . . . 

 Can: 



Maximum. . . 



Minimum . . . 



Average 



Kon: 



Maximum.. . 



Minimum . . . 



Average . . . . 

 Gar: 



Maximum. . . 



Minimum . . . 



Average 



Gul: 



Maximum. . . 



Minimum . . . 



Average . . . . 

 Mon: 



Maximum.. . 



Minimum . . . 



Average. . . . 



Date. 



Oct. 5, 1917. 

 Jan. 23, 1918. 



Oct. 4,1917. 

 Jan. 19, 1918. 



Volume 



per 

 respira- 

 tion.' 



Oct. 30, 1917. 

 Jan. 31, 1918. 



Jan. 10, 1918. 

 Jan. 31, 1918. 



Oct. land 20, 1917. 

 Jan. 21, 1918 



Jan. 14, 1918. 

 Oct. 19, 1917. 



C.C. 



466 

 364 

 389 



588 

 453 

 520 



564 

 395 

 442 



596 

 414 

 476 



634 

 399 



486 



551 

 443 

 492 



Subject. 



Moy: 



Maximum. . 



Minimum. . . 



Average . . . . 

 Pea: 



Maximum . . 



Minimum. . . 



Average .... 

 Pec- 

 Maximum. . 



Minimum. . . 



Average .... 

 Spe: 



Maximum. . 



Minimum. . 



Average .... 

 Tom: 



Maximum. . 



Minimum. . . 



Average .... 

 Vea: 



Maximum . . 



Minimum. . . 



Average. . . . 



Date. 



Jan. 9, 1918. 

 Nov. 23, 1917. 



Dec. 10, 1917. 

 Jan. 24, 1918. 



Oct. 29, 1917. 

 Nov. 19, 1917. 



Volume 



per 

 respira- 

 tion.' 



Oct. 30, 1917. 

 Nov. 5, 1917. 



Nov. 26, 1917. 

 Dec. 19, 1917. 



Oct. 

 Nov. 



8, 1917. 

 5, 1917. 



c.c. 

 493 

 419 

 455 



449 

 346 

 385 



502 

 403 

 433 



539 

 459 

 498 



493 

 372 

 411 



496 

 381 

 433 



» See table 111. 



* Values for Fre are as follows: Maximum, Oct. 5, 349 c.c; minimum, Oct. 11, 327 c.c; average, 



342 c.c. 



• Computed to 37° C, saturated, and prevailing barometric pressure. 



