482 Deferred Papers. [June 16, 



?/(IV°CV) J dx y(0, + B iaJ »)y(B 8 -C iaJ 8) 



+ ^(B^A^J ^ ^(B 3 + A iaJ «) ^(A 2 -B^) 

 If we put 



J da? + j" cfo/ :m0 + J" cfo? w-fjefop . xyz = xyzw, 



and transformed by three equations similar mutatis mutandis to those 

 we have have used, we should of course obtain the sum of four definite 

 integrals. 



The limits are omitted in some of these equations, but they will be 

 easily seen from the foregoing. 



XXXIII. " A Geometrical Interpretation of the first two Periods- 

 of Chemical Elements following Hydrogen, showing the 

 Relations of the fourteen Elements to each other and to 

 Hydrogen by means of a Right Line and Cubic Curve with 

 one real Asymptote." By Rev. Samuel Haughton, M.D., 

 F.R.S. Received April 30, 1 887. 



[Publication deferred.] 



XXXIV. " On the Force with which the two Layers of the 

 healthy Pleura cohere." By Samuel West, M.D., F.R.C.P. 

 Communicated by Sir James Paget, Bart., F.R.S. Re- 

 ceived May 21, 1887. 



[Publication deferred.] 



XXXV. " Total Eclipse of the Sun observed at the Caroline 

 Islands on May 6, 1883." By W. de W. Abney, Capt. R.E., 

 F.R.S. Received May 25, 1887. 



[Publication deferred.] 



