Contents. 



vn 



February 6, 1882. . page 



On the composition of albumen, and the changes which leucine and 



similar bodies undergo in the animal system. By Professor Latham 169 

 Exhibition of a specimen of Duboisia myoporoides. By B. I. Lynch . 186 



February 20, 1882. 



On the effect of fluctuations in a variable upon the mean values of func- 

 tions of that variable : with an application to the theory of glacial 

 epochs. By E. Hill 188 



On the application of quaternions and Grassmann's Ausdehnungslehre 



to different kinds of uniform space. By Homersham Cox . .194 



March 6, 1882. 



The use of telescopes on dark nights. By Lord Bayleigh . . .197 

 On a new form of gas battery. By Lord Bayleigh . . . .198 



Further observations on the transformation of alcohol and on the forma- 

 tion of alcohol and urea in the living body. By Professor Latham. 198 



March 20, 1882. 



On the use of large telescopes in twilight. By J. B. Pearson . . . 205 

 On the rotation of a liquid ellipsoid about an axis, not a principal axis, 



but lying in a principal plane. By A. G. Greenhill . . . 208 



Note on Professor Cayley's paper on the elliptic function solution of the 



equation x^ + y 3 - 1 = 0. By A. G. Greenhill 223 



Notes on solid geometry. By A. J. C. Allen 228 



May 1, 1882. 



On the use of quartz or rock-crystal in the object-glasses of telescopes. 



By J. B. Pearson 229 



On an altazimuth constructed from the designs of the late Bev. Dr W. 



Pearson. By A. Freeman 234 



May 15, 1882. 



On the measurements of a bead of platinum, by the late Professor 



W. H. Miller. By Brofessor Lewis 236 



On a crystal of stephanite from Wheal Newton, by Professor Lewis . 240 



May 29, 1882. 

 Note on a table shewing the time and place of the transit of any star 

 across the prime vertical circle in latitude 52° 12' 10". By A. 

 Freeman 245 



October 30, 1882. 

 On the construction of a negative eye-piece. By J. B. Pearson . . 254 

 On the circumstances producing the reversal of spectral lines of metals. 



By Professors Liveing and Dewar 256 



