90 REPOltT OF NATIONAL MUSEUM, 1922. 



branches of the Government, colleges or other institutions, and 

 special investigators. As exchanges there were shipped 27 lots, 

 comprising 1,201 miscellaneous specimens and TO pounds in bulk ; and 

 as gifts, 20 shipments, aggregating 3,270 specimens, and 75 pounds 

 of blowpipe material, specially prepared to meet individual needs, 

 and in addition, from the sets prepared for distribution to schools, 

 30 sets of minerals and ores, 30 of rock weathering and soils, and 3 

 of invertebrate fossils, with a total of 3,318 specimens. 



Total nuinher of specimens in the depai'tment. — It was stated in 

 last year's report that a conservative estimate of the number of 

 specimens in the department showed a total of not less than 1,500,000. 

 The division reports of the current year estimate the receipts as 

 aggregating 23,504 specimens, thus making the total at the end of 

 the year 1,523,504. The number of duplicates, which are not in- 

 cluded in the above estimate, can not possibly be given. 



