138 Canon Moseley on the Mechanical Impossibility of 



Alcohol added to the serum causes a movement of exosmose 

 from the interior of the globules to the serum. The globules 

 lose a part of their constituent liquids ; and this alteration, 

 which brings on others, is no doubt reproduced in the cells of 

 the various tissues which are bathed by alcoholized liquids. 



What it is now my intention to prove is, that in the blood 

 in particular, and in every living organism of analogous con- 

 stitution (that is to say, formed by cells or utricles filled with 

 a liquid and floating in or bathed by a liquid), it is sufficient to 

 alter, even slightly, the chemical composition of the exterior 

 liquid to cause that of the interior liquid to become modified 

 by endosmose or exosmose. 



As soon as I am enabled to resume possession of my labo- 

 ratory, if I should ever see it again, I propose to follow out 

 the development and application of this principle, either to 

 demonstrate the effects produced by the action of common salt, 

 alcohol, &c. upon the blood, or to show how rapid is that of 

 some agents, of which I have already examined the action, 

 upon the constitution of the globules. 



In the mean time I have yielded to the wishes of your emi- 

 nent President, and I lay upon the table the exposition of 

 those investigations which time may cause to fructify either in 

 my own or more worthy hands. It is a homage that it is a 

 pleasure to my old age to offer to that kind Society which, 

 having, in 1816, guided my youth and the first steps of my 

 career, offers me for the second time, in 1871, after an interval 

 of half a century, the asylum of its friendly hospitality under 

 grievous circumstances to my country. 



XVII. On the Mechanical Impossibility of the Descent of Glaciers 

 by their Weight only. By Henry Moseley, D.C.L., F.R.S.j 

 Canon of Bristol, tyc* 



f 



IN various memoirs on the " Descent of Glaciers " which J have 

 published in the Philosophical Magazine and elsewhere, it 

 has been my object to show : — 



1st. The mechanical impossibility of their descent by their 

 weight only. 



2nd. The actual cause of their descent to be their dilatation and 

 contraction by alternations of temperature, in addition to their 

 weight. 



Mr. Crollt, Mr. Matthews %, Mr. Ball§, andM. Heim|| have 



* Communicated by the Author. f Phil. Mag. September 1870. 



% Alpine Journal, February 1870. § Phil. Mag. February 1871. 

 || Poggendorff's Annalen,\o\.\. (1870),andPhil.Mag.S.4.vol.xli.p,485. 



