Vol. 55 -. Part II. 



MEMOIRS AND PROCEEDINGS 



OF 



THE MANCHESTER 



LITERARY & PHILOSOPHICAL 

 SOCIETY, 19 10-19 1 1. 



CONTENTS. 



Memoirs : 



V. The Development of the Atomic Theory : (4) Dalton's Physical 



Atomic Theory. By Andrew Norman Meldrum, D.Sc. - pp. 1—22. 



(Issued separately, March yth, igil). 



VI. The Development of the Atomic Theory : (5) Dalton's Chemical 



Theory. By Andrew Norman Meldrum, D. Sc. - - - - pp. i — 18. 



{Issued separately, March yth, igil). 



VII. The Behaviour of Bodies floating in a Free or a Forced Vortex. 



By Prof. A, H. Gibson, D.Sc. JVith Text-Jig. - - - - pp. i— 19. 



(Issued separately, March yth, igil). 



VIII. Studies in the Morphogenesis of certain Pelecypoda : (i) A Pre- 

 liminary Note on Variation in Unto pictorum. Unto tumidtis and 

 Anodonta cygnea. By Margaret C. March, B.Sc. Plate and j 

 Text-figs. pp. I — 18. 



(Issued separately, March /4th, igu). 



IX. On an Abnormal Spike of Ophioglossum vulgatum. By H. S. 



Holden, B.Sc, F.L.S. With 6 Text -figs. pp. I— 13. 



{Issued separately, March 2ist, igil). 



X. The Boric Acids. By Alfred Holt, M.A., D.Sc. IViih 2 Text-figs. pp. 1—9. 



{Issued separately, April loth, igii). 



[Continued on p. 4. 



MANCHESTER: 

 36, GEORGE STREET. 



Iprlcc Seven SblUfngs anD Sljpence. 



