2 PROCEEDINGS OF THE WASHINGTON MEETING 



Page 

 Geological transformations of phosphorus [abstract] ; by Eliot 



Blackwelder 47 



Diffusion in silicate melts [abstract and discussion] ; by N. L. 



Bowen 48 



Petrography of the Pacific islands [abstract and discussion] ; by 



R. A. Daly 48 



Some factors which affect the deposition of calcium carbonate 



[abstract] ; by John Johnson 49 



Specific weight of drill cores [abstract] ; by Alfred C. Lane 49 



Chemical and mineralogical composition of meteorites [abstract 



and discussion] ; by George P. Merrill 50 



Importance of water as a magmatic constituent [abstract and dis- 

 cussion] ; by George W. Morey 50 



)/ '"Pele's tears" and their bearing on the origin of australites 



[complete paper and discussion] ; by Elwood S. Moore 51 



Triassic igneous rocks in the vicinity of Gettysburg, Pennsylvania 



[abstract] ; by Geoi'ge W. Stose and J. Volney Lewis 55 



Desert regolith and its genetic relations to maximum epirotic 



deposition [abstract] ; by Charles Keyes 57 



Origin of foliation in the Precambrian rocks of northern New 



York {abstract and discussion] ; by William J. Miller 57 



Landslides in unconsolidated sediments [abstract] ; by David H. 



Newland 58 



Annual dinner 60 



Session of Wednesday, December 29 60 



Report of Auditing Committee 60 



Titles and abstracts of papers presented before the morning session 



and discussions thereon 60 



Ferrous iron content and magnetic properties of the natural 

 oxides of iron as an index to their origin and history [ab- 

 stract] ; by R. B. Sosman and J. C. Hostetter 60 



Variable composition of melanochalcite [abstract] ; by W. F. Hunt 



and E. H. Kraus 61 



Definition and determination of the mineral hydroxides of iron 



[abstract] ; by H. E. Merwin and Eugen Posnjak 01 



Saline fumarole deposits of the south Italian volcanoes [ab- 

 stract] ; by Henry S. Washington Gl 



Crystals and crystal forces [abstract] ; by F. E. Wright 62 



Extension of the Montana phosphate deposits northward into 

 Canada [abstract and discussion] ; by Frank D. Adams and 



William J. Dick 62 



Emerald deposits of Muzo, Colombia [abstract] ; by Joseph E. 



Pogue 68 



Crystalline marbles of Alabama [abstract] : by William F. Prouty. 63 



Oriskany iron ore [abstract] ; by R. J. Holden 64 



Geologic map of the Fort Hall Indian reservation [abstract] ; by 



George R. Mansfield 64 



Preliminary geologic map of the Wayan quadrangle, Idaho- Wyo- 

 ming [abstract] ; by George R. Mansfield 65 



