109 



the results indicate that the male gametes disappear more rapidly 

 from the blood than the female ones. This would explain the different 

 views of authors who have studied the question of the sex of gametes 

 and whose examinations have been made during various phases of the 

 illness. 



Velu (H.). Comment il convient d'organiser la Lutte centre la 

 Gale des Animaux domestiques aux Colonies. — Bull. Soc. Path. 

 ExoL, Paris, xiii, no. 3, March 1920, pp. 186-191. 



It has been remarked that in spite of a vast field of experimentation, 

 the War has ended without any simple and practical treatment for 

 mange having been decided upon. It is admitted that baths, whether 

 liquid or vapour, have the great advantage of reaching every part of 

 the skin, but the most suitable formulae for preparing such baths have 

 given rise to much discussion. None of the numerous papers pubHshed 

 m the professional journals has suggested any simple process which, 

 being less expensive than the installation of sulphur chambers or 

 swimming dij^s, and requiring no great technical knowledge or super- 

 vision, would be suitable for use on isolated farms in the Colonies or 

 in small military stations rarely visited by a veterinary officer. 



The Cooper dip, having been used with much success on pigs suffer- 

 ing from mange, which were cured after four treatments at seven days' 

 interval, was tried for horses in Morocco with equally good results. 

 An epizootic having broken out after the arrival of infected horses and 

 mules from France, 150 cases were sent to the infirmary. A small 

 bath was constructed in 24 hours by raising a cement wall 8 inches 

 high in front of one of the stables, for which 200 litres (44 gals.) of 

 15 per cent, solution was prepared from the instructions issued 

 with this dip. The horses were taken into this bath and sprayed 

 with a pump provided with a long tube and a Vermorel jet, working 

 first over one side of the animal beginning near the head and taking 

 care that the liquid penetrated into every fold of the skin, inside the 

 ear, etc., and then over the other side. For slightly infested and non- 

 chpped animals it is best to swab them over after the first treatment 

 to ensure penetration of the liquid and then spray them again for a 

 few seconds. The liquid can be used repeatedly by filtering through 

 gauze and should be renewed by the addition of 20 gallons of freshly 

 prepared solution each morning. In this manner 25 horses per day 

 were easily treated, and spraying was repeated once each week for 3 

 or 4 weeks. This method is a simple one and obviates the incon- 

 veniences of the usual parasiticide baths, such as variations in con- 

 centration, decomposition, etc. While Cooper's dip has given every 

 satisfaction, it would be interesting to try some of the simple formulae 

 used against the parasites of cattle (ticks, lice, mites, etc.), such as 

 the Watkins-Pitchford arsenical solution, or Chapin's sulphur solution, 

 the preparation of which is described. 



Leger (M.). La Guyane franqaise : Questions de Salubrity et de 

 Reglementations sanitaires. — Btdl. Soc. Path. Exot., Paris, xiii, 

 no. 3, March 1920, pp. 199-204. 

 French Guiana has always had a bad reputation for unhealthiness, 



especially for Europeans, and the opinion is commonly current that 



