1190 EXPERIMENT STATION RECORD. 



What should each dog owner know? T. ItiTT ( Wan muss jcdcr Iluiulehcsitzer 

 iris.s( ii,> ,stutl(i(trt. I'.idS, in,. \ UI + lLi, ttl. /, /iy.s. J/).— The aim of this work 

 is to inform doj; owuers couferuiii;,' (lit'ir duties in order to prevent dojrs from 

 siire.idinfi diseases and parasites injurious to man and domesticated animals. 

 Instructions are given concerning the care and management of dogs, with brief 

 descriptions of diseases which may be transmitted by them. There is also a 

 digest of the laws and police ordinances relating to dogs iu Germany, Austria, 

 and Switzerland. 



A contribution to the study of follicular mange in the dog, X. Almond 

 (Vet. Rcc, 21 {1909), Xo. 1069, />/>. J^.s'-'/JO).— A 2.5 per cent solution of zinc 

 chlorid in water has been used with success by the author in treating this dis- 

 ease in dogs. Applications were made with a sponge at night and in the 

 morning. 



Contributions to the morphology and life history of Piroplasma canis, 

 A. Breinl and E. Hindle (Ann. Tn>i). Med. and Par., 2 (lOOS), Xo. 3, pp. 233- 

 2-'i8. pis. .',; ahs. in Bui. Inst. Pasteur. 6 (1908), No. 20, pp. 909, 910, figs. 5).— 

 The studies here reported were made with a strain sufBciently virulent to kill 

 all the dogs infected. In regard to the flagellate forms the authors report as 

 follows: "Very rarely true small flagellate forms were seen, especially in blood 

 from the lung; but we were never able to trace the origin of the single 

 tiagellum. . . . We have been able to trace the development of large biflageilate 

 forms from the normal intracellular parasite. . . . These observations appear 

 to point to the fact that the biflageilate forms of P. canis represent a very 

 transient stage in its life history." 



The development of Piroplasma canis in culture, G. H. F. Nuttall and 

 G. S. Graham-Smith (Parasitolog,/, 1 (1908). No. 3, pp. 2J,3-260, pi. 1, fig. 1).— 

 The details are presented of studies made by the authors of the development of 

 P. canis in vitro. 



The mode of multiplication of Piroplasma bovis, P. pitheci in the circu- 

 lating blood compared with that of P. canis, with notes on other species of 

 Piroplasma, G. H. F. Xuttall and G. S. Graham-Smith ( Parasitology, 1 ( 1908), 

 No. 2, pp. 13.'i-lJi2, pi. 1, dgnis. /// abs. in Bui. Inst. Pasteur. G (1908), No. 20, 

 pp. 910, 911). — "In stained preparations P. canis, P. horis, and P. pitheci. may 

 be distinguished from other iutracorpuscular parasites by the presence of intra- 

 corpuscular pyriform bodies, usually occurring in pairs and less commonly in 

 fours, eights, and sixteens. These pyriform bodies show a dense mass of chro- 

 matin near the pointed end and a loose mass, often connected with the dense 

 mass, situated toward the blunt end. In suitable preparations peculiar divid- 

 ing forms, most typically reiiresented by trilobed forms or more or less i pyriform 

 bodies joined to a single smaller rounded or elongated mass of protoplasm, 

 may be seen. 



" In the absence of observations on the living parasite we consider that these 

 points may be taken as characteristic of the genus Pirojilasma. 



" In spite of the fact that dividing forms have not yet been found and that 

 the secondary mass of chromatin has not yet been observed P. muris may per- 

 haps be included in this genus. 



"P. fjuadrigeniiuni. an iutracorpuscular parasite r^^cently observed by 

 Nicolle in a small North African rodent (Ctcnodactylus gundi). apparently 

 divides in a totally different manner, and shows a peculiar disposition of the 

 chromatin. No loose chromatin has been observed. Until further observations 

 have been made this parasite can not be included among the true Piroplasma. 



" Further observations are needed before the position of the other so-called 

 Piroplasma can be determined." 



