new series as they come to hand are given the next number to be 

 applied to a series, under the office from which the}- emanate. 



Should an office fail to issue any of the four classes of publications 

 here described, the numbers arc left blank, and the num))cring of 

 such series as they may issue ])egins with figure 5. 



Following the series sjMnbol a colon is used to separate the series 

 figure or figures from the characters used as individual ""book num- 

 bers" to follow. 

 Examples: 



Al. = Agriculture Department, Secretary's Office. 

 Al.l: = Agriculture Department, Secretary- \s Office, annual 



reports. 

 A1.2: — Agriculture Departmeflfit, Secretary's Office, general pub- 

 lications. 



A1.3 

 A1.4 

 A1.5 



= Agriculture Department, Secretary's Office, bulletins. 

 = Agriculture Department, Secretary's Office, circulars. 

 = Agriculture Department, Secretary's Office, miscellane- 

 ous circulars. 

 A1.6: = Agriculture Department, Secretary's Office, special 

 reports. 

 N6. = Navy Department, Hydrographic Office. 

 N6.1: = Nav3^ Department, Hydrographic Office, annual reports. 

 N6.2: = Nav3' Department, Hj^drographic Office, general pub- 

 lications. 

 N6.3: = Navy Department, Hydrographic Office, bulletins. 

 N6.4: = Navy Department, Hydrographic Office, circulars. 

 N6.5: = Navy Department, Hydrographic Office, catalogues and 



lists. 

 N6.6: = Navy Department, Hydrographic Office, corrections and 



additions. 

 N6.7: = Nav}'^ Department, Hydrographic Office [practical papers]. 



Booh rtnmher. 



An individual "book number" is all that is now needed to complete 

 the classification. The symbols for this purpose are written after the 

 colon as the fourth term in the "classification number." In the case 

 of annual or periodical publications the date is used as the book num- 

 ber; for a volumed series the volume number is used, and in a 

 numbered series the number. The works classified as "general pub- 

 lications" being without any of these distinctive features, it is found 

 advisable to arrange them in alphabetical order under the most sig- 

 nificant words of their titles, or under their subjects, and the Cutter 

 Author Table symbols for such words arc used as "])ook numbers." 



12 



