'■Zi) 



knock (]o^^■n, or stuiJeh', but do not kill all the flics, a varying percentage 

 of which recover after an hour or two. In some cases, where the spray 

 seemed fairly effective at room temperature (60-65° F.), it was only 

 necessary to transfer the stupefied flies to a warm room (at 75° F.) for 

 them to recover and speedily regain their full activity. An emulsion 

 of kerosene oil and soft soap, diluted about I in 10, killed the flies 

 within a period of 12 to 18 hours, although it did not stupefy them so 

 (juickly as most of the proprietary sprays. A combination of the latter 

 with, the oil emulsion fluid was tried and gave excellent results. The 

 oil emulsion consisted of three parts of soft soap, completely melted by 

 heat in 15 parts of water. A proportion up to 100 parts of kerosene 

 is then added very gradually with thorough mixing. This emulsion 

 can be kept indefinitely. For addition to the fly-sprays, allowance 

 must be made for the extent to which they are diluted for use, the 

 (luantity of oil emulsion required being 1 in 10 to the water content of 

 the fluid. A description is given of three experiments illustrating the 

 advantages gained by combining the emulsion wdth a cj[uick-action 

 spray. 



Stordy (R. X). Report of the Veterinary Department 1913-1914.— 



Ann. Rep. Dept. Agric. British East Africa, Nairobi, 1915, 

 pp. 126-147. [Received 27th December 1916.] 



African coast fever was most prevalent during 1913 and 1914 in the 

 Nairobi District, Kamasia Reserve and the Kedong Valley. No 

 further outbreaks have occurred on tlie Uasin Gishu Plateau and the 

 quarantine imposed has been removed. 



An arsenical bath of standard strength every three days has proved 

 a satisfactory and easy method of preventing this disease. Difficulty 

 has been experienced in keeping many of tlie baths up to standard 

 strength owing to the oxidation of the arsenite of soda, and its con- 

 version into the arsenate, which is innocuous to the ticks. The 

 (Government has erected a model dipping plant at Nakuru and dipping 

 demonstrations for the information of settlers have been carried out, 

 showing the simplicity and safety of the operation. Where loss by 

 j)oisoning has taken place, it has been shown to be due to carelessness, 

 either in the preparation of the bath, or in allowing the cattle access to 

 the tins of dipping fluid, or in not watering them properly before 

 dipping. When the cattle are once accustomed to the tank as many as 

 326 head have been dipped in twenty-three minutes. Several cases of 

 trypanosomiasis among horses have been recorded during the year. 



Stoedy (R. J.). Report of the Veterinary Department for the Year 

 ending 31st March 1915.. — Ann. Repi. Dept. Agric, British East 

 Africa, 1914 191'j, Nairobi [n. d.], pp. 115-124. 



There were three outbreaks of x\frican coast fever at Nakuru and six at 

 Uasin Gishu during the year, these being in the so-called clean areas. 

 There are now nearly 70 dipping tanks in working order throughout 

 the country, and the efficacy of the three-day interval dips appears to 

 be established over the five-day and seven-day dips. 



