DIVISION OF PUBLICATIONS. 



775 



The difficulties experienced during the past year in the effort to 

 locate the originals or negatives which have been retained by the 

 authors or filed in the dilTerent offices emphasize the necessity of filing 

 all the negatives and original drawings of the illustrations appearing 

 in the department's publications in the illustrating section of the 

 Division of Publications, as directed in your order of June 21, 1911. 



Tlie following table summarizes the work done in the photographic 

 laboratory during the past 12 months: 



Summary of photographic work done during the fiscal year ended June SO, 1912. 



Contact prints, developing paper 50, 840 



Negatives made 3, 392 



Negatives, wet plates ] 09 



Lantern slides 5, 186 



Lantern slides, colored 644 



Plates and films developed 4, 732 



Bromide enlargements 1, 635 



Bromide enlargements mounted SUl 



Mounted, dry tissue 10, 614 



Solar bromide prints 1, 703 



Blue prints 10, 133 



Reproducing prints 92 



Total 89,881 



One hundred and ninety-five requests for photographs, lantern 

 slides, etc., costing $531.23, were complied with, and 8522.19 was 

 collected and turned over to the disbursing office. Nine dollars and 

 four cents is still unpaid. In addition to this service to the public, a 

 large number of cuts from which illustrations appearing during this 

 or previous years in the department's publications had been printed 

 were taken from the files and sent to electrotypers, who furnished 

 duplicates to the applicants at their expense, these cuts being 

 afterwards returned to the files. 



The following table gives a detailed statement of this part of the 

 division's activities: 



