

Journal of the Department 

 OF Agriculture. 



Vol. I. JUNE, 1920. No. 3. 



Piililished monthly in English and Afrikaans by the Department of Agriculture, 



Union of South Africa. 



SuBSCRTPTTON : Within the Union and South-West Protectorate, 3s, (otherwise 6s,) 

 per annum, post free, payable in advance. 



Applications, with subscriptions, to be sent to the Government 

 Printer, Box 37.S, Pretoria. 



SHORTAGE OF PAPER. 



We regret to annoiiuce that owing to the shortage of paper, it is 

 necessary, for the time being, to confine the size of the Journal to the 

 smallest limits. Further, the quality of paper on hand precludes ix 

 s.itisfactory reproduction of certain illustrations, consequently a num- 

 ber which ordinarily would have appeared will need to be withdrawn. 



THE CAUSE AND PREVENTION OF LAMZIEKTE. 



By Sir Arnold Theiler, K.C.M.G., Director of Lamziekte 



Research. 



(Being results of investiqntions undertalien hy Sir Arnold /heller, 

 ' Professor P. R. V'iljoen, Dr.. H. H. Green, Dr. P. J. du Toit, 

 and Dr. H. Meier.) * 



Introduction. 



Fn March of last year \\w announcement was made that the cause of 

 lamziekte had been (lisco\ered, and an explanation was offeied which 

 harmonized the previously conflicting views concerning the etiology 

 of the disease. It was then shown experimentally that the primary 



* Note. — In the work upon i_,amziekte, co-operation was arranged between Mr. R. E. 

 Montgomerj- and myself, as between the Lamziekte Researcli Laboratory at Armoedsvlakte 

 and the Veterinary Research Division at Onderstepoort. the latter division being initially 

 under the charge of Mr. R. E. Montgomery as Director, and subsequently under tliat of 

 Mr. D. T. Mitchell as Acting Director. 



In regard to the botanical work involved in the investigations, I wish to take this 

 opportunity of expressing my great obligations to Dr. I. B. Pole Evans, Chief of the Division 

 of Botany, Pretoria, for his unfailing help. 



I also wish te express my appreciation of the work of the general staff, more particuLarly 

 that of Mr. Theo. Meyer, technical officer in charge of Armoedsvlakte, for his enthusiastic 

 devotion to the experiments. — A.T. 



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