62 Report of the President 



usually perfect block of translucent bluish chalcedony of 

 natural color. The figurine, which is entitled "Pas de Danse," 

 is the work of M. Tonnelier, the eminent French 

 The _ artist stone engraver, and was exhibited in the 



Figurine Paris Salon of 1912. It is one of the finest known 



examples of gem carving. It was a gift from the 

 late J. Pierpont Morgan to his lifelong friend Mr. Lanier and 

 typifies Mr. Morgan's well known taste and knowledge in ac- 

 quiring objects which combine the highest qualities of art with 

 the best standards of rarity. 



A revision of Guide Leaflet No. 4 has been prepared, con- 

 siderably extending the scope of the present Guide, which 



passed into its Second Edition in 1904 and of 

 Publications «• «_ ,, * * , , < 



which the supply is nearly exhausted. 



The material of the Bement Collection is especially rich in 

 crystallized specimens, many of which have never been figured 

 and among which there is unquestioned evidence 

 of rare and new forms. It is proposed to under- 

 take the description of this collection in the form of a Crystal- 

 lographic Atlas to be issued in parts, each part devoted to a 

 section of the Collection and to consist of plates with descrip- 

 tive text. The equipment for this work, a Hutchinson Uni- 

 versal Goniometer, has been ordered from James Swift and 

 Son of London. Pending the delivery of this instrument, 

 which has been delayed by war conditions, the department, 

 through the courtesy of Professor Moses of Columbia Uni- 

 versity, has been offered the use of a goniometer, in order that 

 the study may not be unnecessarily delayed. 



Among the mineral specimens that have been added to the 



collection displayed in the Morgan Hall of Minerals during the 



past year, are several which, by reason of their 



exceptional quality, their rarity and their current 



interest, are worthy of a short descriptive note. 



A magnificent group of dioptase crystals from the Kirghese 

 Steppes, Siberia, constitutes a notable addition to the fine suite 

 of this copper silicate already on exhibition. Also from Si- 

 beria comes a handsome group of the rare mineral achtaragdite, 



