259 



(a) If the modification consists in the omission of part of the 

 original title, the omitted part must be represented by 3 or 

 4 dots, e.g. : — 



Conductivity of gases . . . 



Ueber die . . . Kathodenstrahlen. 



(/>) If the modification consists in adding words whicli are not 

 in the original title, such added, words must be placed within 

 square brackets [ ]. 



(c) If the entry is entirely different from the original title it 

 must be placed within square brackets. 



(rf) If there are both omissions and modifications, both dots 

 and square brackets must be used. 



Combined Slips. 



67. In order to facilitate the work of those who use ar 

 mechanical process for multiplying copies (whether by printing, 

 carbonic process, typewriting, &c.), a combined form of slip may 

 be used for both Authors' and Subject Catalogue. 



In such slips the Registration Jjetter must come first, followed 

 by the Registration numbers in the order of their importance, 

 beginning with the most important. 



It will then be found that it is possible to prepare the slips in 

 such a way that the Regional Bureau can, by striking out certain 

 parts, render them suitable for the Authors' Catalogue, and by 

 striking out certain other parts, render them suitable for the 

 Subject Catalogue. 



Thus : 



N. 6007. 6031. Manatus inunguis. 

 Anatomy. 



Beddard, F. E. Notes on the anatomy of a manatee {manatus 



inunguis) lately living in the Society's gardens. London. 

 Proc. Zool. Soc, 1897, (47-53). [6007, 6031], 



could, by striking out certain words, be made to run : — 



(«). N. 



Beddard , F. E. Notes on the anatomy of a manatee (vianatut 



inunguis) lately living in the Society's gardens. London. 

 Proc. Zool. Soc, 1897, (47-53). [6007, 6031.] 



(1757) E 2 



