Proceedings. 177 



{Mathematical and Physical Section^ 

 loth December, 1890. 



James Bottomley, B.A., D.Sc, F.C.S., President of the 



Section, in the Chair. 



Dr. Bottomley gave the following differential equation 

 arising from the consideration of a problem relative to the 

 absorption of light : — 



d}p dp 



dxdt dx 



Ordinary Meeting, December 30th, 1890. 



James Bottomley, B.A., D.Sc, F.C.S., Vice-President,. 



in the Chair. 



The thanks of the members were voted to the donors, 

 of the books upon the table. 



Mr. J. Cosmo Melvill, M.A., F.L.S., read a paper 

 entitled : " Description of Drosera intermedia (Hayne) 

 forma subcaulescens, with remarks on the geographical 

 distribution of the family." 



A paper on " A New Symbolic Treatment of the Old 

 Logic," by Mr. JOSEPH JOHN MURPHY, communicated by 

 the Rev. ROBERT Harley, F.R.S., F.R.A.S., was read 

 by Dr. J. F. W. Tatham. 



