Examples — Continued. 



N 14. 5:885 = Navy Department, Naval Observatory, Astronom- 

 ical and Meteorological Observations, 1885. 

 Nl4:.5":As8 = Same (separate). Astrophotographic Congress, 

 International, etc. ; by A. G. Winterhalter. 1889. 

 (Reprint of Appendix 1, Astronomical and Mete- 

 orological Observations, 1885.) 

 The superior figures are used to differentiate between two publica- 

 tions which may of necessity be assigned the same symbol in the 

 alpha])etical classification, and also to distinguish between the various 

 editions of the same serial or numbered publication. 



Examples: 



A1.2: = Agriculture Dept., Secy's Office, general publications. 



A1.2:Ag8* = Agricultural colleges. List of delegates and 



visitors to tenth annual convention of Asso- 

 ciation of American Agricultural Colleges and 

 Experiment Stations, 1896. n. t. p. 3 pp. 

 A1.2:Ag8* = Agriculture Department. [Letter as to work 



and needs of Depai-tment of Agriculture; by 

 William G. Le Due] February 27, 1880. 

 n. t. p. 15 pp. 

 116.5: = Interior Department, Education Bureau, Circulars 



of Information. 



116.5:875' = 1875, No. 1. Proceedings of Department of 



Superintendence of National Educational 



Association, Washington, D. C, January 27 



and 28, 1875. 1875. Ill pp. 1 pi. 



116.5:875* = 1875, No. 2. Education in Japan; [by William 



E. Griffis and David Murray.] 1875. 61 pp. 



N6.8: = Navy Department, Hydrographic Office, publications 



(numbered). 

 N6.8:90* = No. 90. Development of great circle sailing; 



by G. VV. Littlehales. 1889. 53 pp. 5 pi. 

 1 map. 

 N6.8:90* = Same, 2d ed. 1889. 63 pp. 7 pi. 2 maps. 

 It will bo scon that the system here presented is expansive enough 

 to cover an}^ number of departments, offices, series, or books, and that, 

 too, in as concise a form as possible. A long or intricate classification 

 number is not only hard to apply to a book, but it is difficult to 

 remember in consulting the shelves, and it should therefore be as 

 short and simple as possible. Certainly the numbers or symbols in 

 the method herein described express a great deal in a limited space, 

 and it is hard to conceive of a shorter method of expressing such a 

 phrase as "Interior Department, Geological and Geographical Survey 



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