67 



washing process would be destroyed later during drying in the hot 

 air tumbler. Cotton khaki clothing washed at a temperature of 

 120° F. to 130° F. (48-8° to 54-4° C.) for 15 minutes would not retain 

 any un destroyed lice in the active stages, but the eggs would not all 

 be killed. Washing continued for 30 minutes, however, would result 

 in the destruction of all of these also, as would also the drying of such 

 uniforms in the hot air tumbler. 



In woollen goods, neither lice nor their eggs were destroyed by the 

 regular washing or by drying, which was effected at room tempera- 

 ture to avoid shrinkage. In view of the unsatisfactory results obtained 

 by adding a chemical such as cresol or lysol to the washing suds, the 

 following procedure for the laundering of woollen goods to destroy 

 both lice and eggs is recommended. Infested garments should be 

 washed at a temperature of 120° F. (48'8° C.) and this should not fall 

 below 115° F. (461° C.) during the washing period of 15 minutes, this 

 treatment destroying the active stages without the use of any special 

 chemicals. The garments are then treated in the usual manner until 

 perfectly dry, when they should be placed in the hot air tumbler at a 

 temperature of 150°- 170° F. (65-5° C. to 76-6° C.) for 10-15 minutes 

 to destroy the eggs. This method makes it possible to launder 

 woollens without shrinkage and to destroy lice and eggs without the 

 use of a special chemical. 



Hadlington (J.). The Fowl Tick. — Agric. Gaz.N.S.W., Sydney, xxix, 

 no. 12, 2nd December 1918, pp. 892-896, 2 figs. 



The fowl tick [Argas persicus], which is treated by many poultry 

 keepers as merely a blood-sucking pest, is also the transmitter of a 

 blood parasite, Spirochaeta marchouxi vel gallinarum, which causes 

 a fever that often either kills the fowl outright, or weakens it so that it 

 dies from anaemia. Individuals that survive become immune to 

 further infections. 



In order to eradicate this tick, fowl-houses and roosts should be 

 properly constructed of corrugated galvanised iron, painted to keep 

 them cool, or of well-seasoned, closely built hardwood palings. 

 Infested poultry houses should be thoroughly sprayed with kerosene 

 emulsion by means of a force pump, so that every crack and crevice 

 may be reached, two or three applications being given at intervals 

 of a day or two. The emulsion should be made by slowly adding 1 

 gal. kerosene to 1 gal. of boiled soft water in which 8 oz. of soft soap 

 have been dissolved. After stirring briskly for 10 minutes, 10 gals, 

 soft water should be slowly added. A quart of kerosene tar added to 

 the emulsion in place of the same quantity of the kerosene renders 

 it more effective, and it may also be used to paint the roosts as an 

 additional preventive. 



Boy6 (G.) &; GuYOT (R.). Contribution a la Lutte conti^ les Mouches. 



[A Contribution to the Campaign against Flies.] — Bull. Acad. Med., 

 Paris, Lxxxi, no. 3, 21st January 1919, pp. 80-84. 



In experiments against fly larvae a mixture of potassium perman- 

 ganate and formalin was found to be particularly successful. The 



