1030 



SCIENCE. 



[N. S. Vol. XV. No. 391. 



throw Light on the Problem of its Constitu- 

 tion ' ; Section IV., ' Cellulose Groups, includ- 

 ing Hemicelluloses and Tissue Constituents of 

 Fungi'; Section V., 'Furfuroids, i. e., Pento- 

 sanes and Furfural-yielding Constituents 

 Generally'; Section VI., 'The Lignocelluloses'; 

 Section VII., ' Pectic Group ' ; Section VIIL, 

 'Industrial and Technical; General Review'; 

 Index of authors; Index of subjects. 



The authors should be highly commended 

 for their appreciation and treatment of the 

 practical industrial problems connected with 

 cellulose. Pure science is not lowered in the 

 estimation of most men because it may have 

 practical bearings, and it is almost needless 

 to say that some of the greatest advancements 

 in scientific knowledge have been brought 

 about by men who had an eye for the practical 

 as well as the scientific side of investigations. 

 The subject is developing rapidly at the pres- 

 ent time from both the scientific and the 

 practical side, and it certainly offers an invit- 

 ing field for students of chemistry who wish to 

 make their work count for something in the 

 commercial as well as the scientific world. 



A. F. Woods. 



SCIENTIFIC JOURNALS AND ARTICLES. 



The Journal of Comparative Neurology for 

 June contains the following articles : (1) 

 'ISTumber and Size of the Spinal Ganglion 

 Cells and Dorsal Root Fibers in the White Rat 

 at Different Ages,' by S. Hatai. The number 

 of spinal ganglion cells does not change with 

 age, though some small cells become large cells 

 and the number of dorsal root fibers increases. 



(2) 'Observations on the Medulla Spinalis of 

 the Elephant with some Comparative Studies 

 of the Intumescentia Cervicalis and the ITeu- 

 rones of the Oolumna Anterior,' by I. Har- 

 desty. In addition to the histological exami- 

 nation of the elephant, there is a similar study 

 of the spinal cords of a series of twelve mam- 

 mals of diminishing body weights, with statis- 

 tics of the ratios to body weights of the dimen- 

 sions of the spinal cord and ventral horn cells. 



(3) 'Observations on the Post-mortem Absorp- 

 tion of Water by the Spinal Cord of the Frog,' 

 by H. H. Donaldson and Daniel M. Schoe- 



maker. There is a post-morten absorption of 

 water by the spinal cord of Rana virescens 

 amounting sometimes in 24 hours to 25 per 

 cent, of the normal weight of the cord. The 

 conditions under which this absorption takes 

 place were experimentally studied. (4) 'Ob- 

 servations on the Developing Neurones of the 

 Cerebral Cortex of Foetal Cats,' by S. Hatai. 

 Confirms Paton's observation that the den- 

 drites develop before the neurites or axones. 

 The usual literary notices complete the niun- 

 ber. 



The contents of the American Journal of 

 Mathematics for July, 1902, are as follows: 



' Die Typen der linearen Complexe elliptischer 

 Curven im R^ ,' von S. Kantor ; ' Generalization 

 of the Differentiation Process,' by Robert E. 

 Moritz; 'Simple Pairs of Parallel W-Sm-faces,' 

 by Henry Dallas Thompson. 



SOCIETIES AND ACADEMIES. 

 THE AMERICAN ASSOCIATION FOR THE ADVANCE- 

 MENT OF SCIENCE. 



We have received preliminary lists of the 

 papers to be presented before three sections of 

 the Pittsburg meeting of the American Asso- 

 ciation for the Advancement of Science, as 

 follows : 



SECTION C AND THE AMERICAN CHEMICAL SOCIETY. 



Tuesday, July 1, 1902. 



' Valence ' : Iba Remsen. 



' Tlie Ozone from Potassium Chlorate ' : Ed- 

 WAED Haet. 



' Electric Combustion ' : Edwaed Haet. 



' The Chlorides of Ruthenium ' : Jas. Lewis 

 Howe. 



' Electrolytic Deoxidation of Potassium Chlo- 

 rate ' : WiLDEE D. BaNCEOFT. 



' The Solid Phases in Certain Alloys ' : Wilder 

 D. Banceoft. 



' An Improved Grinder for Analysis of Motlier- 

 beets ' : David L. Davoll, Jr. 



' The Electrical Conductivity and Freezing 

 Points of Aqueous Solutions of Certain Metallic 

 Salts of Tartaric, Malic and Succinic Acids ' : 0. 

 F. TOWEE. 



' Recent Progress in the Fireproofing Treatment 

 of Wood ' : Saml. P. Sadtleb. 



' Ionic Velocities in Liquid Ammonia Solu- 

 tions ' : E. C. Franklin. 



