LIBRARY CATALOGUE SLIPS. 
[Take this leaf out and paste the separated titles upon three of your catalogue 
cards. The first and second titles need no addition; over the third write that 
subject under which you would place the book in your library.] 
United States. Department of the interior. (U. S. geological sur- 
vey. I 
Department of the interior | — | Bulletin | of the | United 
States | geological survey | no. 186 | Series E. Chemistry and 
physics, 35 | [Seal of the department] | 
Washington | government printing office | 1901 
Second title: United States geological survey | Charles D. 
Walcott, director | — | On ] pyrite and marcasite | by | H. N. 
Stokes ] [Vignette] | 
Washington | government printing office L901 
8 1 . :»u pp., 1 pi. 
Stokes (H. N.). 
United States geological survey j Charles D. Walcott. di- 
rector | — | On | pyrite and marcasite | by | H. N. Stokes | 
( Vignette] | 
Washington | government printing office ; 1901 
8 ■')'» pp., 1 pi. 
["United States. Departnn nf of the interior, i U. SI. g< ological survey.) 
Bulletin L86.] 
United States geological survey [ Charles D. Walcott. di- 
rector | — | On | pyrite and marcasite | by [ H. N. Stokes | 
[Vignette] | 
Washington \ government printing office | 1UU1 
8 . 50 pp., 1 pi. 
[United States. Department of the inti -i<>r. {JJ. S geological survey.) 
Bulletin 186.] 
