151 

 General questions ana announcements 



I. The Hubrecht Laboratory. 



The adjunct Director of the Hubrecht Laboratory, Dr P. D. Nieuwkoop, 

 has left on the 15th of September for the United States, where he will visit 

 several institutes and where he will be staying till about the beginning of 

 November 1 952. During that time only personal correspondence 

 should be directed to his correspondence address: c/o Rockefeller Foundation, 

 49 W. 49th street. New York 20, N.Y., U.S.A. All correspondence concerning 

 the activities of the Hubrecht Laboratory should be sent directly to: Hubrecht 

 Laboratory, Internat. Embr. Inst., Janskerkhof 2, Utrecht, Holland. 



IL The Central Embryological Library. 



A. Collection, annual survey of literature, etc. 



We can announce that the card-index according to subjects has been 

 completed, so that we are now able to provide on application surveys of all 

 literature on special subjects which is present in the C.E.L. As the card-index 

 has been made according to the classification system used in 

 t h e G.E.LS., it is the easiest way for you as well as for us if you use this 

 classification-system when applying for a survey. 



The collection of reprints has now been definitely arranged according to 

 the year of appearance. This system has several advantages, e.g. the possibility 

 of storing a part of the oldest literature somewhere else, in case the collection 

 becomes too extensive. Consequently there are now three card-indexes, ac- 

 cording to authors, subjects and years of appearance respectively. 



This year we again received a very satisfactory number of reprints from 

 many investigators, for which we wish to express our gratitude. In the spring 

 of next year we will again dispatch a number of new publications from the 

 Hubrecht Laboratory. 



As mentioned in the previous issue (chapter i), we intend to publish, starting 

 with 1 952, an annual survey of all embryological litera- 

 ture issued in the preceding year, which should of course 

 be as complete as possible. For this reason, as well as for the further 

 building-up of our collection of reprints, we hope that every embryologist will 

 send us, respectively will go on sending us, two copies of all his/her 

 publications!) (one copy for the C.E.L. and an extra one, if 

 possible for the collection of Dr Nieuwkoop, which is meant for internal 

 use in the Hubrecht Laboratory). The titles of the papers, coming in in this 

 way, will automatically form the greater part of the annual survey. It is 

 apparent that for this plan we need the collaboration of every 

 embryologist. 



In case of private collections, which are not in use any more and which 

 may otherwise get lost, it will be highly appreciated if they could be added 

 to the Central Embryological Library of the Hubrecht Laboratory. 



B. Services rendered by the C.E.L.; conditons for borrowing. 



1. Every embryologist can ask for information about hterature 



^) not only the recently published ones, but also the older papers are very 

 important to make our collection of reprints as complete as possible. 



