Fourth Series. Vol. 4 : No. 3. 



MEMOIRS AND PROCEEDINGS 



OF 



THE MANCHESTER 



LITERARY & PHILOSOPHICAL 



SOCIETY. 



1890-91. 



CONTENTS. 



Proceedings - - - - - - - pp. 177, 178, 180, 181 



Microscopical and Natural History Section - - - p. 179 



Physical and Mathematical Section - - - - - p. 177 



Memoirs : — 



The History and present position of the Theory of Glacier 



motion. By H. H. Howorth, M.P., F.S.A. - - p. 69 



On the Intensity of Transmitted Light when] the co- 

 efficient of transmission of the medium is a function 

 of time. By James Bottomley, B.A., D.Sc, F.CS. p. 152 



Hymenopterological Notices. With Plate. By P. Cameron p. 182 



Description of Drosera intermedia (Hayne), forma subcau- 

 lescens, with remarks on the Geographical distribu- 

 tion of the family. By James Cosmo Melvill, M.A., 

 F.L.S. p. 195 



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