(45i) 



ton. Mr. Albert L. de Lautreppe has contributed a number 

 of cottons obtained in Peru. An interesting set of specimens 

 has been contributed by the Waterman Fountain Pen Co., 

 illustrating the different stages in the conversion of ordinary- 

 rubber into the hard rubber of the pen-holder. 



Under the new conditions afforded by the large increase of 

 case room, now being supplied, the accumulation of material 

 should be resumed. This work, together with the mounting 

 of materials now stored, and the rearrangements rendered 

 necessary by their installation in the cases will make the 

 coming year one of great activity in this department. 



Respectfully submitted, 



H. H. Rusby, 

 Curator of the Economic Collections. 



