©N RCSPr RATION. OQC) 



TTenry Cline had judiciously taken the precaution to examined in a 

 divide the tr:u.'hea just below the cricoid cartilage, before *|e°j"j\"""^'^" 

 he opened the tliorax ; he then inserted a tube with a brass 

 stop-cock, which he tied flrinly to tiie trachea, and at- 

 tached ai) empty bladder to the other ead. The cock was 

 then turned, so as tocommunicate with the bladder, and 

 on opening the thorax 3l| cubic inches of air were expelled 

 into it. 'Hie weight of the lunos was four pounds one 

 ounce. A very large glass jar, being j)laced in a shallow 

 tin vessel, was filled to the briin with water, the lungs were 

 then completely immersed, and the water which flowed over, 

 and was tlie measure of their volume, weighed six pounds 

 two ounces: we next cut a portion of the lungs into small 

 pieces, under a large inverted glass of water» and attempted 

 to squeeze the air from the cells, but although several 

 cubic inches were thus procured, we were soon convinced 

 that it was utterly impossible to arrive at our object by 

 these means, as no force that we could use seemed capa* 

 ble of expelling the air from the cellular membrane, into 

 ■which it escaped from the vesicles. We therefore took 

 portions of the lungs, which weighed 2774 grains; the 

 mass, being put into a piece of new hair cloth, was subjected 

 to the action of a powerful screw press, and the fluid was 

 received into a vessel; -after twice undergoing this opera- 

 tion, the mass weighed only 66o grains. Its specific gra- 

 vity was very nearly that of water, viz. *930, water being 

 I'OOO : the fluid procured by the press was of the specific 

 gravity of I'OIQ; this would make the specific gravity of 

 the lungs •997> vvater being 1*000; hence it appears, that 

 the substance of the lungs, and the contents of the blood- 

 vessels together, are so near the specific gravity of water, 

 that they may be fairly considered as the same. 



Then, as the rr.a':s of the lungs was equal to 4 pounds of 

 water, though 6*2 pounds of water were displaced by them» 

 and as a pound of water occupies the space of 28*875 cubic 

 inches, we have the following calculation: 



lbs. 



