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REPORT OF NATIONAL MUSEUM, 1920. 115 



History; Prof. W. L. Bryant, Buffalo Society of Natural Sciences; 

 Miss Julia Gardner, Mr. W. C. Mansfield, Mr. W. P. Woodring 

 and Dr. C. Wythe Cooke, of the Geological Survey. 



Distributions. — There have been prepared and sent out from the 

 department 11 shipments, aggregating 460 specimens, as gifts; 30 

 shipments, aggregating 1,969 specimens, as exchanges; and 30 ship- 

 ments, aggregating 801 specimens, for study. Of the last, much 

 of the unstudied material, counted for convenience as specimens, 

 was actually contained in lots, it 1 icing impossible to state the num- 

 ber of specimens. 



In addition to these specially prepared materials there were sent 

 out as gifts 10 sets of minerals and ores, aggregating 850 speci- 

 mens; 3 sets illustrating rock weathering and soil formation, 63 

 specimens; and G sets of invertebrate fossils. 273 specimens. 



Total number of specimens in the Department. — For reasons that 

 have been repeatedly stated in years past, it is impossible to give 

 with anything like accuracy the number of specimens in the col- 

 lections, either duplicates or otherwise. The statement given below 

 regarding the exhibition series is based on an estimate made in 

 February, 1019. 

 Estimated specimens on exhibition, February 11, 1919: 



Chemical and dynamical geology 2,159 



Meteorites Si!. - , 



Ores and noninetallic minerals 6,704 



Building and ornamental stones 2,613 



Minerals, systematic scries 5,132 



Gems 1,500 



Penological colled ions 1, 704 



Invertebrate fossils 24,000 



Vertebrate fossils 650 



Fossil plants . .">, GOO 



Total 50.887 



