88 Scientific Intelligence. 



The Collected Mathematical Works of George William 

 Hill. Volume Four. Pp. 460, 4to. — This volume contains me- 

 moirs No. 51 to No. 84. 



Research in China. In three volumes and Atlas. Volume 

 I in two parts. Part I : Descriptive Topography and Geol- 

 ogy ; by Bailey Willis, Eliot Blackweldee, and R. H. 

 Sargelnt. Pp. xiv, 353, xvi, with 51 plates and 65 figures. 

 Accompanied by a folio Atlas embracing 41 pages of Geograph- 

 ical and Geological Maps, largely colored. — A notice of this 

 highly important work will appear later. 



Selection and Cross-breeding in Relation to the Inheritance of 

 Coat-pigments and Coat-patterns in Rats and Guinea-pigs ; by 

 Hansford MacCurdy and W. E. Castle. Pp. 50, with 2 plates 

 and 31 tables. 



Further Researches Concerning Atomic Weights of Potassium, 

 Silver, Chlorine, Bromine, Nitrogen, and Sulphur ; by T. W. 

 Richards in collaboration with Arthur Staehler, George S. 

 Forbes, Edward Mueller, and Grinnell Jones. Pp. 88. 



The Compressibilities of the Elements and Their Periodic 

 Relations ; by Theodore W. Richards, in collaboration with 

 W. N. Stull, F. N. Brink, and F. Bonnet, Jr. Pp. 67, with 

 7 figures. 



3. Field Museum of Natural History. — The official title of 

 the Field Columbian Museum, as it was formerly known, has 

 recently been changed to the form here given. The Annual 

 Report of the Director, Dr. Frederick J. V. Skiff, to the Board of 

 Trustees for 1906, contains besides general administrative matter 

 of particular importance to those engaged in museum work, a 

 portrait of the late Mr. Marshall Field, the founder of the Museum, 

 and some remarks about him and his work. Other publications 

 of the Museum recently issued include the following : — 



Botanical Series. Vol. II, No. 4, Publication 117. Studies 

 in the Genus Citharexylum ; by Jesse More Greenman. Pp. 

 185-190. Vol. II, No. 5. (No. 118.) 



Flora of the Sand Keys of Florida ; by Charles Frederick 

 Millspaugh. Pp. 191-243. 



Geological ' Series, Vol. Ill, No. 5. (No. 120.) Analyses of 

 Iron Meteorites ; compiled and classified by Oliver Cummings 

 Farrington. Pp. 59-1 10. — The author has here brought together 

 all reliable analyses of iron meteorites classified according to the 

 physical structure of the specimens, the classification being that 

 ordinarily in use as developed particularly by Brezina and Cohen. 

 This compilation is not only of very great interest and value in 

 itself, but it serves to bring out clearly the relation between 

 chemical composition and structure. In regard to this the author 

 states : — 



" The most striking feature brought out by the analyses is the 

 relation shown between chemical composition and structure. This 

 seems to be definite and general. All the meteorites of a hexa- 

 hedral structure have a nearly uniform composition, while among 



