Ill The Central Embryological L i b r a r y (C.E.L.) 



A The reprint collection 



The collection at present comprises a total number of about 20 000 titles. 

 Every year nearly 2000 papers are added. Part of these are received on a 

 basis of exchange against publications issued by the Hubrecht Laboratory 

 (see B). The rest are reprints received on request. To this end nearly all 

 titles relating to developmental biology are regulary extracted from a number 

 of important review journals. 



B Reprint exchange 



Until recently the Institutes and research groups appearing on the mailing 

 list of the Hubrecht Laboratory automatically received all publications issued 

 by the Laboratory. In order to secure a more efficient and wider distribution 

 a different system has been adopted. At regular intervals lists of titles of the 

 reprints available are now sent out, and the recipients are requested to check 

 off and return the list. At the same time the mailing list has been extended. 



C Services rendered by the C.E.L. ; conditions for borrowing 



1 . Every embryologist can ask for information about literature of 

 certain authors, for surveys of literature on certain subjects (according 

 to the classification-system of the G.E.I.S.), for surveys of newly 

 published literature, etc. 



2. Every embryologist can borrow reprints which are not available 

 in his own country. Books and Normal tables are usually not lent out, 

 volumes of periodicals are only lent out to investigators in the Nether- 

 lands. 



Conditions: 



a. Reprints may be borrowed for 3 months at the utmost (for the 

 Netherlands 1 month), time for shipment not included. 



b. The receipt added to the consignment must be returned by return 

 of post, after having been controlled and signed. 



c. In case of high forwarding charges these have to be partly carried 

 by the applicant. 



3. Every embryologist can personally consult the C.E.L. at all 

 times. 



4. The C.E.L. will be at the disposal of every embryologist working at the 

 Hubrecht Laboratory. 



IV The Central Embryological Collection of slides 



and material 

 A Concise Catalogue 



Copies of the "Concise Catalogue" of the Collection, which was issued in 

 1953, are still available on request. 

 B Conditions for borrowing 



Conditions: 

 1. Slides, material in paraffin and/or material in alcohol can only be bor- 

 rowed for one year, after which it has to be returned automatically 

 if no special request for extension of the loan has been made by the 

 investigator and has been approved by the staff of the Hubrecht Labor- 

 atory. 



229 



