274 Field Columbian Museum — Reports, Vol. i. 



with great care from tlie charts of Beer and Madler and of Dr. Schmidt 

 of the Athens Observatory, undoubtedly the greatest authority upon 

 the topography of the moon of his time. Five years were occupied 

 in its construction. The sections of the model have been kept for 

 some years in Chicago, but they have not been available for obser- 

 vation until the gift of Mr. Reese made possible its erection by the 

 Museum. It is believed that the model as exhibited will prove of 

 great interest to the public in general and especially to students of- 

 astronomy. Besides the collections made in the field by the Curator 

 and his assistants, mention of which is made under the proper 

 heading, many additions of value have been gained through gift, 

 purchase, or exchange in the Department of Geology. The meteorite 

 collection has been enriched by several fine specimens. These 

 include, among others, sections of the Roeburne, Mungindi, San 

 Angelo, Tonganoxie. and Sacramento Mountain meteorites. A mag- 

 nificent specimen of aurichalcite, undoubtedly the finest in ex^ 

 istence, has been added through the generosity of Captain A. B. 

 Fitch. A fine series of stalactites and other cave products from 

 Mammoth and Wyandotte Caves was received from E. B. Baldwin. 

 Other cave specimens of unusual beauty have been obtained by 

 purchase and exchange, and the collection in this line is now 

 one of unusual size and value. A collection of varieties of candles 

 made from petroleum has been donated by the Standard Oil Com- 

 pany and makes an attractive and economic display. R. W. Goodell 

 gave a fine specimen of fossil fish from the Green River, Wyoming, 

 beds; G. H. Hammond a large and complete collection illustrating 

 varieties of clay stones, and Mr. C. C. Hafer a series of Trenton fos- 

 sils from Minnesota. Two tusks, several teeth and leg bones of 

 great size, of the Mammoth, brought from Alaska by Miner W. Bruce, 

 have been received as a loan and placed on exhibition. An unusually 

 perfect skull and part of a skeleton of a species of Elotherium were 

 obtained by purchase. A petrified egg of a miocene bird acquired at 

 the same time deserves mention as being a specimen of more than 

 usual scientific interest. Specimens of a number of rare minerals 

 were obtained by exchange with Dr. Otto Kuntze, and many fine 

 specimens of crinoids of the Burlington group b}' exchange with J. 

 M. T. Myers. Miscellaneous minerals and fossils of value were 

 obtained by exchange with the Case School of Applied Science. Four 

 beautiful slabs of marble, donated by the Georgia Marble Company, 

 deserve mention, also a large collection of ores and minerals of eco- 

 nomic value from the Nashville, Cincinnati, and St. Louis Railroad; 

 about 1,200 briquettes from George H. Hartwell; a collection of silver- 



