[ * ] 
XXIV. On the Values of the Integral I Q„Q n ,dgj, Q a , Q„, being Laplace’s Coefficients 
Jo 
of the Orders n, n', with an application to the Theory of Radiation. By the 
Hon. J. W. Stkutt, Fellow of Trinity College , Cambridge. Communicated by 
W. Spottiswoode, F.R.S page 579 
XXV. On a Searcher for Aplanatic Images applied to Microscopes , and its effects in 
increasing Power and improving Definition. By G. W. Royston-Pigott, M.A.. 
M.J). Cantab ., M.R.C.P . , F.C.P.S . , F.R.A.S., formerly Fellow of St. Peters 
College, Cambridge. Communicated by Professor Stokes, Sec. R.S. . . . 591 
Index ... 605 
