134 C.-E. A. WINSLOW 



a third institution, the National Collection of Type Cultures, 

 has been estabUshed by the Medical Research Council of Great 

 Britain at the Lister Institute under the direction of Dr. J. C. G. 

 Ledingham. 



Dr. Ledingham has asked for American assistance in his work 

 and it is obviously most desirable that the closest cooperation 

 should exist. He will furnish the American Museum with any 

 new cultures he receives and we will send him all of ours that he 

 may desire. Such an arrangement will not only make for the 

 convenience of British and American bacteriologists, but will 

 offer a double insurance against the loss of strains of delicate 

 constitution. 



The present note is presented to call the attention of the bac- 

 teriologists of America to the facilities offered at the Lister In- 

 stitute and the American Museum and to urge upon all who 

 may describe new bacterial species the great importance of 

 promptly depositing with us the original type strain so that it 

 may be available for the comparative study of systematists in 

 future years. 



