Fourth Series. Vol. 9 : No. 2 



MEMOIRS AND PROCEEDINGS 



OF 



THE MANCHESTER 

 LITERARY & PHILOSOPHICAL 



SOCIETY. 



1894-95. 



CONTENTS. 



Proceedings - - - pp. 66, 86, 92 



Memoirs : — 



On the Affinities of Polybasic Acids. By Bevan Lean, D.Sc, 

 B.A., Assistant Lecturer, and late Bishop Berkeley Fellow 

 of Owens College. Communicated by W. H. Perkin, 

 jun., F. R.S. p. 19 



On the light thrown upon the question of the Growth and 

 Development of the Carboniferous Arborescent Lepido- 

 dendra by the study of the details of their Organisation. 

 By W. C. Williamson, LL.D. and F.R.S., Emeritus 

 Professor of Botany in the Owens College, Manchester - p. 31 



On the Multiple Proportions of the Atomic Weights of Elemen- 

 tary Substances in relation to the unit of Hydrogen. By 

 Henry Wilde, F. R.S. : - - p. 67 



On a Comparison of the thermometers used by the late Dr. Joule 

 with the Standards of the Bureau International des Poids 

 et Mesures. By Arthur Schuster, F.R.S. - - - p. 87 



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