432 
tion six differential equations of the second order satisfied by 
a, b, ¢, f, g, h considered as functions of (wu, v, w); viz. the forms 
are 
, oY aE - — a = given function of first derived functions, 
deg ah da at 
Hee aie an aa given function of do. 
and as a consequence of these he obtains a seventh differential 
equation of the second order, symmetrical as regards the coeffi- . 
cients (a,b, c), (f g, h), and the variables (w, v, w) ; which seven 
equations are the chief analytical results arrived at in the 
memoir, The memoir:contains various developments in rela- 
tion to the curvature of the surfaces, &c. 
HONORARY MEMBERS ELECTED. 
Feb. 28, 1876. Prof. Luigi Cremona, Rome. 
March 13. Joseph Prestwich, F.R.S., Prof. of Geology at 
Oxford. 
NEW FELLOWS. 
Feb. 14,1876. Edward Tanner, M.A., Christ’s College. 
J. N. Langley, B.A., St John’s College. 
March 13. W. M. Hicks, B.A., St John’s College. 
G. T. Bettany, B.A., Caius College. 
