Geological Society. 145 



Then assuming 



?! + ?2 + ^3 + ?4 + ?5 + (if6= 0- 



3(?i + 24) — <r=«',; 3(«/3 + 26) — <r=W2; 3(gr5 + gr„)_o-=w3 ; 



3(2. -?4) -3=^,; 3(23-^6)-^=^,; 3fe-y-^=p,; 

 which require that 



Wi + Wi + W3 = 0, and f), + P2 + f3 = 0; 

 we have 



*4 = [1-(/+.) + *j5. *4 = [. + (/-.)-*]S. 



These equations, integrated by the usual process to fulfil the pre- 

 scribed conditions, determine <r, S', Wj, w^, Wj, ^i, f 2» ps ; and we then 

 have, for the solution of the problem, 



?i=g(<r + ^ + «;i + pO: ?3= gCi^+^ + Wa + Ps); 2i= gCf^ + ^+Wa+p,) ; 



" Experimental Researches on the Functions of the Mucous Mem- 

 brane of the Gall-bladder, principally with reference to the Conver- 

 sion oi Hepatic into Cystic Bile." By George Kemp, M.D. Cantab. 



The author deduces from his experiments the following generali- 

 zations : — 



1 st. That the mucus of the gall-bladder is not merely a secretion 

 destined to lubricate the interior of that orgaii and protect it from 

 the irritation of its other contents, but is an essential integral portion 

 of the C3'Stic bile. 



2ndly, That the gall-bladder is not merely a receptacle and reser- 

 voir for the bile, but an organ highly endowed with organic func- 

 tions ; and that the proper secretiou of the liver is converted into 

 cystic bile mainly through the agency of its mucous membrane. 



GEOLOGICAL SOCIETY. 

 [Continued from p. 78.] 



December 3, 1856.— Col. Portlock, R.E., President, in the Chair.^ 



The following communications were read : — 



1. "On the Volcanic Eruption of Mauna Loa in 1855-56." By 

 F. A. Weld, Esq. Communicated by Sir C. Lyell, V.P.G.S. 



In a letter dated July 12, 1856, he communicated the information 

 he had obtained respecting the late Eruption in Hawaii, and gave a 

 detailed account of his ascent of Kilauea and Mauna Loa, with 

 observations on the craters and on the condition of the lava-stream 

 which had lately been ejected from a lateral opening on the latter 

 mountain. Mr. Weld remarked also that a slight shock of earth- 

 quake had been felt on the Island of Maui, which is also of volcanic 

 formation. 



Phil. May. S. 4. Vol. 13. No. 84. Feb. 1856. L 



