390 EXPERIMENT STATION RECORD. 



concerning the fate of pyogenic organisms in suscoptilile and immune 

 animals. After organisms have come to l)c located in the hypodermal 

 connective tissue, they are rapidly carried into the blood and internal 

 organs. This is accomplished largel}^ by means of the lymph currents. 

 The observed microscopical facts in connection with this problem lend 

 no aid to the theor}' that pathogenic organisms may be cai'ried from 

 the source of infection to other parts of the bod}^ through the agency 

 of phagocytes. Many pathogenic organisms which have become located 

 in the subcutaneous connective tissue are later excreted in the urine 

 and bile. This excretion is occasionally ver}^ extensive. The early 

 period of primary excretion of the pathogenic organisms is called b}^ 

 the author the elimination period of infection. A bibliograph}' of 130 

 titles on the literature of the subject is appended to the article. 



Report of the biologist, J. Nelson {^^eiv Jersey Stax.. Rpt. 1899^ 

 jjp. '273-320, pis. Jt). — The author reports that among the college dairy 

 herd as many abortions occurred during the j^ear following the disin- 

 fection treatment as during the preceding year. 



Details are given of a number of autopsies upon animals which had 

 been condemned after receiving the tuberculin inoculation. The author 

 gives a summary of observations extending over a period of 6 3'ears 

 upon the college dairy herd with reference to the extermination of 

 tuberculosis in this herd. From observations made during this time, 

 the author concludes that allowance should always be made for indi- 

 vidual differences in the reaction to the tuberculin test; that, as a 

 general theory, a resting period of several months should be allowed 

 between any 2 tuberculin tests; and that the course of the disease does 

 not seem to be affected by tuberculin injections, either by waj^ of aggra- 

 vation or alleviation of the disease. A general discussion is presented 

 of the contagiousness of tuberculosis, on the curative action of tubercu- 

 lin, on the advisability of a reinjection, the length of period between 

 injections, the rapidity of development of tuberculosis, and the detec- 

 tion of tuberculosis by physical symptoms. 



The author made a study of a bacteriological disease of ducks which 

 resembled to some extent chicken cholera. An outbreak of this disease 

 occurred in a flock of 100 ducks and as the death rate became large it 

 was reconmiended that 1 per cent carbolic acid be given in the drinking- 

 water and that an astringent ])e given in soft feed. These remedies 

 seemed to have a decidedly beneficial effect in checking the disease. 

 The author made cultures of the micro-organism and inoculated one of 

 the partly recovered ducks from the diseased flock. A mild attack of 

 the disease followed this inoculation. The disease in question seemed 

 to be confined lai'gely to the small intestines. The liver appeared 

 normal and the oXXun- 2><>st-'inorteiii findings were not strictly like those 

 of chicken chohn-a. Inoculations of pure cultures of the bacillus in 

 guinea })igs were without result. 



