VARIOLA OF PIGEONS. 413 



the micrococcus vaccines through fifteen successive 

 generations. 1 If this is true he will be able to 

 claim the prize offered by the Grocers' Company 

 of London : 



" The subject of the Grocers' Company's first discov- 

 ery prize of 1,000 for original research in connection 

 with sanitary science is c A method by which the vac- 

 cine contagion may be cultivated apart from the animal 

 body, in some medium or media not otherwise zymotic ; 

 the method to be such that the contagium may by means 

 of it be multiplied to an indefinite extent in successive 

 generations, and that the product after any number of 

 such generations shall (so far as can within the time be 

 tested) prove itself of identical potency with standard 

 vaccine lymph.' The prize is open to universal compe- 

 tition, British and foreign. Competitors for the prize 

 must submit their respective treatises on or before the 

 31st of December, 1886, and the award will be made 

 as soon afterwards as the circumstances of the compe- 

 tition shall permit, but not later than the month of 

 May, 1887. All communications on the subject must 

 be addressed to the clerk of the Grocers' Company, 

 London, from whom circulars giving the conditions can 

 be obtained." 



VARIOLA OF PIGEONS. In a communication 

 to the French Academy, presented by Vulpian, 

 M. Jolyet gives an account of an experimental re- 

 search, made in collaboration with MM. Delage 

 and Lagrolet, relating to the etiology of the dis- 

 ease known as variola of the pigeon or picote. He 

 says : 



1 Berlin Ivlin. Wochenschrif t, Jan. 22, 1883. 



