AND MINING RECORD. 



VOT,. IV. 



FRIDAY, FEBRUARY 14. 1902. 



No. 25. 



The Journal is issued fortnightly, i.e.. every second Friday. Communications to be addressed to 

 the Editor " Agricultural Journal," Department of Agriculture, Maritzburg. 



The Journal may be obtained from the Publishers. The Times Printing and Publishing 

 Company. Limited, upon payment of an Annual Subscription of os. With the exception ot tue 

 Portuguese Colonies, the Journal is franked to all pares of South Africa. 



Reading Cases for holding a year s issues of the " Agricultural Journal." leather back, cloth sides 

 26 strings, lettered on side, Is. fid. each. Binding yearly volumes in cloth. 4s. each. 



CONTENTS. 



District Reports 

 Veterinary. 



'^:ftinderrest, by H. Watkins-Pitch- 

 fotd, F.B.C.V.S. 

 Abstracts from Reports for January 

 Agriculture. 



Director of Agriculture. Ariival of 

 Mapstone Oats 



Chemistry for Beginners, by Archd. 

 Fearce 



Potato Grower, A Successful : Mr. 



L. S. Kershaw.— By Ergaies 

 Chewing 's Fescue Grass and Wheat 

 Indigo Manufacture 



„ No'.es.— By Alex. Pardy 



PAGE. 



772, 



769' 

 796 



773 

 775 



777 



779 

 783 

 784 

 789 



PAGE. 



Dairy. 



Natal Creamery. Annual Meeting... 793 



Forestry. 



Grey Box Gum 



Miscellaneous. 



Natives Identification Act 

 Geoloay : Report by Government 



Geologist ... 

 Wilkinson, The late Mr. Anthony ... 

 Six Months as a Stableman. By J. 



P.Godfrey... 

 Locust Acts ... 



Market Reports 



774 



771 



772 

 786 



792 



BOO 



776 



RindGrpest. 



By H W^TKINS-Pitchford, F.R.O.V.S., Government Bacterologist and 

 Director Veierinary Department. 



t Continued.) 



rPHE principle of injecting a small 

 1 quantity of blood into the system 

 of an animal immuned with bile was 

 adopted, doubtless, with the hope of 

 being able thereby to produce a longer 

 period of insusceptibility in the animal so 

 treated. In other words, it was hoped 

 that an injection of virulent blood would, 

 if withstood, convert the passive and 

 temporary immunity given by the bile 

 into an active immunity such as that con- 

 ferred by an actual attack of the disease.^ 

 We all know that the immunity given 

 by a single dose of bile is of short and 



uncertain duration. Koih, in his original 

 publicationF, stated thit the immunity 

 following a dose of 10 CO. of rinderpest 

 bile " sets in on the 10th day at latest, 

 and is of such extent that even four 

 weeks afterwards 40 c.c.m. of rinderpest 

 blood can. be injected without any in- 

 jurious result," and from this fact he 

 concludes " that the immunity produced 

 in such a m inner is of an ' active 

 nature." From the experience of the 

 past four years, we now know that the 

 duration of the immunity given by a 

 single dose of bile is on an average from 



