CONTENTS. 



I'AGE 

 F.DIIOlilAI, Ndte ... ... ... ... ... ... .. i 



()Fti( EH.s .\.N'i) Council ... ... ... ... ... ... ii 



CoNsiiit'iioN OF jiiE Association ... ... ... ... iii 



Taki.es : Past Annual Meetings : — 



I'laces and Datos. i'lesidciits. \ ici' I'rositleiils aiKi Lucal 



iSecretaries ... ... ... .. ... ... xii 



Sectional Presidents and Secietaric-.s ... ... ... ... xiv 



Evening Discourses ... ... ... ... ... ... xvii 



L()rREN(,'0 MARgiES MEETING. 1<)'22 :— 



Meetings ... ... ... ... ... ... ... xix 



Officers of Local and Sectidnal Coniniittees ... ... ... x.\i 



Proceedings of Twentieth Annual (leneral Meeting ... ... xxiii 



Report of Council, 1921-22 ... ... ... ... ... xxvii 



lion. Treasurer's Report and Accounts ... ... ... xxx 



Fifteenth Award of Soutli Africa Medal and Grant ... ... xxxiv 



Association Lihrarv . . ... ... . . ... ... xxxvii 



I'uesident's Address : "Post-Cretaceous Climates of Snuth Africa," 



l.y A. W. Rogers, Sc.D., F.R.S. ... ... ... ... 1 



AllDRESSES l!Y I'RESIDEN'IS DF SECTIONS : 



Section A : " Tlie Role nf Astrcmoinv in the I>evclopinent of 



Science." hy M. A. Peres. Juil.'D.S,-. . . ... ... 32 



Section B : " The Influence of Mineral Deposits on the Develop- 

 ment of a "S'oung Country." hy E. T. Mellor, D.Sc. ... 42 



Section C : " Carhon Assimilation." hy D. Tlioday, M.A. ... 52 



Section D : " Some Modern Developments in Animal I'arasito- 



logy," liy Annie Porter, D.Sc. ... ... ... ... 64 



Section E : " Certain Aspects of the Native Question," hy 



A. W. Roberts, D.Sc. ... ... ... ... .'.. 95 



Secticju V : " Remarks on certain Mental Disorders which may 



lie regai'ded as Prevental.lc." hy J. Mai'ins Moll. M.D. ' Kl.') 



I'cm.Tc Lecture : " The Eailv Development of South .Xfrica." hv 



C. Graham P>otha ' ... .. ... li:i 



List of I'apers Head at Seitional Meetings ... ... ... 117 



P.vi'ERs Read ano PriujsiiEi) : — 



" The Waterworks Department of the Antofagasta (Chili) and 



Bolivia Railway Company." hy H. IP Fox .. . . 120 



"Investigation of Different Methods of 'J'esting ]^.alic<i(k Milk 



Bottles." l.y B. J. Smit, B.A. ... ...' ... . . l-'i2 



"Notes on the Chemical Control of Cat lie Dip|)ing Tanks." hy 



C. O. Williams, B.Sc. ... . . ... ... . 137 



" Descloizite from South West Africa." hv P. .\. Wagner. 



Inir.D.. P.Sc. .. . . ... '... 1 I-' 



