DIRECT PASSAGE FROM THE STOMACH TO THE BLOOD. 



173 



perception of it was not sufficiently certain. The temper^iture 



was 17*75° [63*95° F.]. Having measured by this experiment 



the intensity of the sound produced in atmospheric air, we 



again made a vacuum in the globe, and introduced into it a 



sufficient quantity of sulphuric ether, to leave a surplus 



above what the temperature could convert into vapour. 



The specific gravity of this ether was 0'759. The elastic lather intra. 



force of its vapour, measured by introducing it under a ba- EJas^Hcity of 



rometer freed from air, was 0*3549 met. [13*963 inches], at Jt* vapour. 



the temperature of 17*75° [63*95° F.]. The globe being 



tilled with this vapour, it was carried to the same place as 



in the preceding experiment; when we found, that the 



sound was perceptible to the distance of 131*5 met. [143*7 Distance at 



yards]. This conclusively proves in the most <-o"vincing ^Ji^j |^^^ 



manner, that sound is produced and transmitted in vapour, heard. 



as well as in a permanent gas. But we have proved, that This proves 



this can take place only from the eftect of instantaneous va- *^® niomenta- 



"^ . ry variations 



nations of temperature, occasioned by the vibrations. It of temperature 



evidently follows therefore, that this cause really exists: f^"^^^ ^^ ^^" 



•^ _ ... . brations ac- 



and that, according to the judicious remark of Mr. Laplace, cording to the 

 it becomes indispensable for us to pay attention to it in the ^!^®*"^>' o^La- 

 niathematical theory of the propagation of sound; though 

 we cannot directly verify it by the application of the ther- 

 mometer, because tHis instrument can no more be aiFected 

 by these successive and momentary variations of heat, than 

 the barometer is by the momentary variations of elasticity, 

 that take place in the production of sound, and of which 

 every one notwithstanding acknowledges the existence. 



III. 



Experiments to prove^ that Fluids pass directly from the Sto- 

 mach to the Circulation of the Blood, and thence into the 

 Cells of the Spleen, the Gall Bladder , and Urinary Blad- 

 der, without going through the Thoracic Duct» By Eve- 

 RARD Home, Esq. F, R. S*. 



.AVING on a former occasion laid before the Society Fluids p«£8 

 some experiments, to prove, that fluids pass directly from *^^°°^ ^^^ ^*** 



• Philos. Trans, for 18II, p, 163. 



the 



