CONTENTS. 



MEMOIRS. 



I. On the Origin of Cometary Bodies and Saturn's Rings. 

 By Henry Wilde, D.Sc, D.C.L., F.R.S. Plates 

 I.— III. pp. I— 20 



(Issued separately 1 November nth, igio). 



II. Notes on Scattering during Radio-active Recoil. By 

 Walter Makower, M.A., D.Sc, and Sidney Russ, 



D.Sc. With 2 7 ext-figs pp. 1—4 



{Isstied separately, December i6th, igio). 



III. The Development of the Atomic Theory : (2) The Various 

 Accounts of the Origin of Dalton's Theory. By Andrew 

 Norman Meldrum, D.Sc. pp. i — 12 



(Issued separately, Dece/nber 17th, iqio), 



IV. The Development of the Atomic Theory : (3) Newton's 

 Theory, and its Influence in the Eighteenth Century. 

 By Andrew Norman Meldrum, D.Sc. ... pp. i — 15 



{Isstced separately, December 17th, igio). 



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

 Physical Atomic Theory. By Andrew Norman 

 Meldrum, D.Sc pp. i — 22 



(Issued separately, March 7th, igir). 



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

 Chemical Theory. By Andrew Norman Meldrum, 

 D.Sc. ... ... pp. I- 18 



(Issued separately, March 7th, igil). 



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

 Vortex. By Prof. A. H. Gibson, D.Sc. With 

 Text-Jig. ... ... ... ... ... ... pp. I — 19 



(Issued icparately, March 7th, igil). 



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

 Preliminary Note on Variation in Unio pictorum, Unio 

 Tiimidtis, and Anodonta cygnea. By Margaret C. 

 . March, B.Sc. Plate mid j Text-Jigs pp. i — 18 



(Issued separately, March 14th, igri). 



