I'-'-O] VETERINAKY MEDICINE. 471 



lilaiit and such care of stock as will prevent hungry animals from coming into 

 cuiitaet with masses of the weed." 



An account of tlrfs plant and eradication work with it by W. L. May at the 

 Colorado KxptMinient Station has previously been noted (E. S. R., 43, p. 141). 

 The whorled milkweed, a plant poisonous to live stock, C. D. Marsh 

 ([/. S. Dept. Agi:, Dept. Circ. 101 (1920), pp. 2, fig. i).— This circular calls ut- 

 tontion to the poisonous effect of this plant upon live stock, a detailed account 

 I'f which is noted above. 



The poisoning of Iiorses by the common bracken, S. Hadwex and E. A. 

 Bkuck (V(^ Jour., 76 {1920), Ho. 537, pp. DS-IOD, figs. 2).— The authors report 

 upon observations of the affection caused by Ptcris aquilina, locally known as 

 staggers, which has been prevalent on the Pacific slope of British Columbia 

 for many years. The mortality among horses in the Eraser Valley and on 

 Vancouver Island was very heavy during the hard winter of 191.5-16. Feed- 

 lug experiments with four animals are summarized as follows : 



•'Of the four animals that developed the disease, one showed symptoms on 

 the twenty-fourth day and was dying on the thirty-fifth day. . . . The second 

 horse did not show marked symptoms until the thirty-eighth day. and was 

 dying on the forty-sixth day, when it was killed. The length of time it took 

 the .second horse to develop symptoms as compared with the first was no 

 doubt due to the fact that for about 12 days properly dried bracken could 

 not be procured, and also to the mistaken kindness of a careless attendant 

 who was caught giving the animal green clover. The third horse, which had 

 served as control in the two preceding experiments, was fed on hay exactly 

 as received from a local source. The hay carried 29 per cent bracken and 

 ( aused the death of the animal in 36 days. The fourth experiment was some- 

 what different to the others; this animal was fed 4.4 lbs. of fern per day for 

 three weeks, and was then reduced to 2.4 lbs. per day for a further three 

 weeks with no apparent ill resulting. Upon increasing the daily feed of fern 

 to 6.9 lbs., definite symptoms of the disease were noticed on the twenty-ninth 

 day after this increase, and the animal was killed on the thirty-fifth day. 

 Judging from the foregoing, it can be assumed that an addition to the daily 

 diet of about 6 lbs. of dried bracken will kill a horse in about one month." 



Review of the literature of the past five years on anaphylaxis and re- 

 lated phenomena, A. R. Cunningham (Amcr. Jour. Disfasea Children, 19 

 (1920), No. 5, pp. 392-412). — This is an extensive review of recent literature 

 on anaphylaxis and related phenomena with 87 references to the literature. 



Progress in eradicating contagious animal diseases, J. R. Mohler (U. S. 

 Dept. Agr. Yearbook 1919, pp. 69-78, figs. 8). — This is a review of the Progress 

 made in eradicating diseases of live stock. The results accomplished are 

 graphically illustrated by means of charts in the cases of contagious pleuro- 

 pneumonia, cattle scabies, sheep scabies, bo\'ine tuberculosis in the District of 

 Columbia, cooperative tuberculosis eradication in the United States, cattle 

 ticks, and foot and mouth disease, and the extent of hog cholera losses. 



Blackleg, .7. W. Bknner (Cornell Vet., 10 (1920), No. 2, pp. 121-132).— This 

 Is a discussion of the occurrence, limiting conditions, symptoms, and methods of 

 control of blackleg. The older methods of immunization against blackleg are 

 reviewed briefly and the newer methods discussed more fully. A list of 21 ref- 

 erences is apjiended. 



The application of the lipoid fivation reaction to the diagnosis of 



glanders, E. Meinicke and E. Neumann (Ztschr. Vctcriniirk., 30 (1918), No. 6, 



pp. 265-270, fig. 1). — In continuation of the study of the lipoid fixation reaction 



for glanders previously noted (E. S. R., 43, p. 277), the authors suggest 



7622°— 20 6 



