362 Mr. J. N. Langley. On the [May 13, 



It may be urged by some that the phenomena observed in 1878 

 may only after all have been equatorial streamers. 



It is obvious, therefore, that this point deserves the closest attention 

 during future eclipses, until it is settled one way or the other. 



May 13, 1886. 



Professor G. G. STOKES, D.C.L., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



Dr. Walter Lawry Buller (elected 1879) was admitted into the 

 Society. 



The following Papers were read : — 



I. " On the Structure of Mucous Salivary Glands." By J. N. 

 Langley, M.A., F.R.S., Fellow and Lecturer of Trinity 

 College, Cambridge. Received April 14, 1886. 



The cells of mucous salivary glands I have previously described as 

 consisting of a framework or network, containing in its spaces hyaline 

 substance and granules.* I have also mentioned that during secre- 

 tion the granules disappear from the outer portions of the cells. f A 

 similar disappearance of granules has been found by BiedermannJ to 

 occur in the cells of the mucous glands of the tongue of the frog. 



The granules of the mucous salivary glands are rendered very dis- 

 tinct by irrigating a mounted specimen of a fresh gland with mode- 

 rately dilute solutions of neutral or alkaline salts. I have generally 

 used sodium chloride solution 5 per cent., and sodium carbonate solu- 

 tion 3 per cent. In these fluids the granules can scarcely be distin- 

 guished from small fat globules ; those of the submaxillary gland of 

 the dog have a diameter of 1 to 2 /x, those of the orbital gland of the 

 dog are a little larger. 



In the resting gland the granules are fairly closely packed through- 

 out the cell, in a line stretching from basement membrane to lumen 



* " Proc. Camb. Philos. Soc," vol. v,p. 25, 1883, and " Internat. Jour. Anat. and 

 Histol.," vol. i, p. 69, 1884. 



t " Jour, of Physiol.," vol. ii, p. 276, 1879. 



X " Wien. Sitzungsb.," P>d. 86, Abt. iii, p. 67, 1882. 



