386 [Jan. 8, 



It is not necessary to allude further to his well-known theory it is 

 sufficient to show that two separate causes cooperate in producing a 

 rotation or curvature of currents such as I have described. I have 

 not the slightest doubt that a strong curvature of atmospheric cur- 

 rents to the right does frequently exist, owing to the descent of cold 

 air from above ; for in lately charting the weather of Europe thrice 

 daily during a month, I found it more or less present on from fifty 

 to sixty occasions. Its existence is consonant to what we should 

 expect. It is hardly possible to conceive masses of air rotating in a 

 retrograde sense in close proximity, as cyclonogists suppose, without 

 an intermediate area of direct rotation, which would, to use a mechani- 

 cal simile, be in gear with both of them, and make the movements of 

 the entire system correlative and harmonious. 



The result I have thus far arrived at, and which I should look for 

 hereafter, is that whenever the barometer shows circumscribed areas 

 of marked elevation and depression at distances not exceeding 1500 

 miles apart, a line drawn from p. 



the locus of highest to that of 



lowest barometer would be cut / ^^ . 



by parallel wind-currents at an / ^^ ^ J 



angle of about 45, in the way ^ 7 x-x"*\ \ \ \ /^ 

 shown in the diagram. \^ V_y \ \^ X^irri'V 



I doubt if it be of advantage j ^^~ S 



to investigate the changes of Highbarom. Lo^barom. 



wind produced by a system of ^P*'*)- (indraught;. 



indraught and dispersion passing over any locality, because the 

 barometrical sections vary so rapidly as to make the incoming portion 

 unsymmetrical with that which ha.s already passed over. 



V. "On the Immunity enjoyed by the Stomach from being 

 digested by its own Secretion during Life," By FRE- 

 DERICK W. PAVY, M.D. Communicated by Dr. SHARPEY, 

 Sec. E.S. Received December 11, 1862. 



(Abstract.) 



The author referred to the communication by John Hunter " On 

 the Digestion of the Stomach after Death," published in the ' Philo- 



