NOTE. 



The authors of the several papers contained in this volume are 

 themselves accountable for all the statements and reasonings which 

 they have offered. In these particulars the Society must not be 

 considered as in any way responsible. 



CONTENTS 



MEMOIRS. 



I. The Herbarium of John Dalton. By R. S. Adamson, M.A., B.Sc, 



and Alison McK. Ckabtree ... ... ... ... pp. i — 46 



( Issued sepa7-ately. May 15th, iqiQ.) 



II. The Ancient Legend as to the Hedgehog carrying Fruits upon its 



Spines. By Miller Christy, F.L.S pp. i — 14 



( Issued separately^ May Ijt/i, iQlQ.) 



III. On a New Middle Carboniferous Nauliloid ( Ccclonaiitilus trapezoidalis). 



By J. Wilfrid Jackson, F.G.S. With i Plate ... ... pp. i — 4 



(Issued separately, July bt/i, iQiq.) 



IV. On the Superposing of Two Cross-Hne Screens at Small Angles and 



the Patterns obtained thereby. By S. Lees, M.A. With j Plates 



and 10 Text-Jigs. ... ... ... ... ... ... pp. i — 26 



( Issued separately, Sepleviher ^oth, iqiq.) 



V, Henry Wilde. By Professor W. W. Haldane Gee, B.Sc. 



M.Sc.Tech., A.M.I. E.E. With 4 Plates pp. i — 16 



(Issued separately, June 3otIi, iqso.) 



PROCEEDINGS 



Annual Report of the Council, 1919 

 Treasurer's Accounts 



List of the Council (1918-19) 



List of the Wilde Lectures 



List of the Special Lectures 



List of the Awards of the Dalton Medal... 



List of the Presidents of the Society 



pp. 1. XX. 



pp. xxi. — xxiv. 



pp. XXV. — xxvii. 



p. xxviii. 



pp. xxix. — XXX. 



p. XXX. 

 p. XXX. 



pp. xxxi. — xxxii. 



