(443) 



gating 368 have been received for the Columbia Her- 

 barium. 



All the parts of sheets, resulting from the cutting of an 

 original sheet of standard size, on which two specimens were 

 mounted, have been remounted on new sheets of the proper 

 size and placed in their respective species-covers. The 

 specimens of many genera, especially such as have been 

 critically studied by officers or students, have been furnished 

 with new species-covers. 



5. General Duplicate Herbarium. Although during 

 the course of each previous year considerable exchanging 

 has been carried on, with individuals and other institutions, 

 the number of duplicate herbarium specimens increased much 

 faster than we were able to send them out in exchange for 

 others. The already large accumulation was greatly in- 

 creased by the thousands of duplicate specimens which were 

 derived from the several older herbaria, the mounting of 

 which has been referred to in a previous paragraph. 



Fully 25,000 specimens from our duplicate herbarium have 

 been distributed to other institutions from which we have 

 already received other specimens in exchange, or credit 

 which will bring us returns within a year or two. 



6. Uses of the Herbarium. The members of the Garden 

 staff have made constant use of this collection in questions 

 relating to the development of the several departments, in the 

 pedagogic work in connection with the courses of instruction 

 for research work, and special investigation. The members 

 of the teaching staff have made similar use of the herbarium. 

 The registered students of both the Garden and Columbia 

 University have had free access to the collections as their 

 studies and investigations demanded. 



Officers and students of other institutions and private inves- 

 tigators have from time to time consulted such portions of 

 this collection as their investigations required, while respon- 

 sible persons generally have drawn on this source of informa- 

 tion in regard to special questions. 



7. Extra Collections. The two herbaria designed for 



