246 



4. In indexing- accordiag to subject-matter regard shall bo 

 liad, not only to the title (of a paper or book), but also to the 

 nature of the contents. 



5. The Catalogue shall comprise all published original contri- 

 butions to the branches of science heieiuafter mentionef.', 

 whether appearing iii periodicals or in the publications of 

 Societies, or as independent pamphlets, memoirs or books. 



6. Translations are to be dealt with as original papers but 

 with an indication, if possible, that they are translations. 



7. A contribution to science for the purposes of the Catalogue 

 shall be considered to mean a contribution to the mathematical, 

 physical, or natural sciences, to the exclusion of what are some- 

 times called the applied sciences. 



Technical matters of scientific interest shall, however, be 

 included in the Catalogue, but shall be referred to under the 

 appropriate scientific headings. 



8. The followiug branches of science shall be included 

 within the scope of the Catalogue, and shall be indicated as 

 follows by the letters of the alphabet in consecutive order as 

 Registration Letters. 



A. Mathematics. 



B. Mechanics. 



C. Physics. 



D. Chemistry. 



E. Astronomy. 



F. Meteorology (including Terrestrial Magnetism). 



G. Mineralogy (including Tetrology and Crystallo- 



graphy). 

 H. Geology. 



J. Geography (Mathematical and Physical). 

 K. Paleeontology. 

 L. General Biology. 

 M. Botany. 

 N. Zoology. 

 0. Human Anatomy. 

 P. Physical Anthx'opology. 

 Q. Physiology (including experimental Psychology 



Pharmacology and Experimental Pathology). 

 K. Bacteriology. 



9. The subject-matters of each of the above sciences will be 

 gjouped under a convenient number of headings, each of which 

 will be indicated by an appropriate symbol, usually a number. 

 These symbols will be called Registration Numbers or Si/mbo/s, as 

 the case may be. Schedules showing the headings and symbols 

 approved by the International Council will be provided. 



