BIBLIOGRAPHY, A STUDY OF RESOURCES. 155 



The plan on which the cards are written is indicated by 

 the following form : 



WHITMAN, CHARLES O. M. 1893.1 



The Inadequacy of the Cell-Theory of Development. 

 ! Journ. Morph., VIII, 639-658. 



The upper right-hand corner contains the catalogue number 

 (Mark's system), the M showing that the pamphlet is in my 

 collection, and that the card is not merely a bibliographical 

 one. It is better to have the catalogue number on the left, for 

 it is then less likely to be covered by the hand in turning over 

 the cards. The Roman numerals are used to designate the 

 volume, the Arabic the pages. When there are plates, the 

 numbers of those are given also. The exclamation point at 

 the left indicates that the card has been verified by comparison 

 with the original publication. All my catalogued pamphlets 

 are divided into three sets: (i) octavo unbound pamphlets; 

 (2) octavo bound pamphlets ; (3) quarto pamphlets, whether 

 bound or unbound. When a pamphlet is bound, the card is 

 marked " Bd." In each of the three sets the pamphlets are 

 arranged by authors, and those of each author chronologically. 

 Thicker pamphlets are bound singly, thinner pamphlets several 

 together, but binding many papers in one volume is sys- 

 tematically avoided. The binding costs from twelve to eigh- 

 teen cents ; the backs are plain black cloth, with a white paper 

 label, on which the author's name and the catalogue numbers 

 of the pamphlets are written by hand ; the sides are covered 

 with marbled paper. The unbound octavo pamphlets are kept 

 in Manilla paper pamphlet-boxes. From time to time I look 

 them through to select those which I wish to have bound. 



The system described is simple, and to me it has seemed 

 convenient and altogether satisfactory, so that I am ready to 

 recommend it, though of course some other system may be 

 equally good for private use. 



My catalogue serves me also as a bibliography, and I main- 

 tain a list of titles, which are copied from my cards and 

 grouped under subjects. In this way I compiled my Bibliog c 



