392 



SCIENCE. 



[N. S. Vol. I. No. 14. 



of the coal. The decrease in all of the areas 

 is toward the old shore line at the north 

 and northeast. In the anthracite area it is 

 very gradual until one passes the prongs in 

 the southern field, where the thickness of 

 coal increases abruptly. With that abrupt 

 increase in thickness is an equally abrupt 

 change in the amount of volatile. It seems 

 probable that the anthracite of Pennsyl- 

 vania is due to the long continuance of 

 coal-making periods during which the 

 chemical change was unchecked, leading 

 eventually to complete loss of the hydrogen 

 and oxygen. 



At the conclusion of the paper, discus- 

 sion followed, but failed to shake the 

 speaker's main points. A paper by J. E. 

 Wortman, on ' The Geology of the Bad 

 Lands,' was postponed until the next meet- 

 ing. J. F. Kemp, 



Secreta7'y. 



SCIENTIFIC JOURNALS. 

 BULLETIN OF THE AMERICAN MATHE- 

 MATICAL SOCIETY, MAECH. 



Arthur Cayley': Professor Charlotte Angas 



Scott. 

 The Theory of Functions : Professor W. F. 



Osgood. 

 On the Introduction of the Notion of Hyperbolic 



Functions : Professor M. W. Haskell. 

 Notes; New Piiblications. 



THE JOURNAL OF THE AMERICAN CHEMICAL 

 society, APRIL. 



The Superiority of Barium Hydroxide Solution 

 as an Absorbent in Carbon Determinations in 

 Steel: James O. Handy. 



The Contributions of Chemistry to the Methods 

 of Preventing and Extinguishing Conflagra- 

 tion : Thomas H. N"orton. 



Note on the Estimation of Iron and Alumina in 

 Phosphates: K. P. McElroy. 



Some Practical Points in the Manufacture of 

 Nitroglyeerol : J. E. Blomen. 



Methods for the Examination of Glycerol for me 



in the Nytroglycerol Manufacture : G. E. 



Barton. 

 Esthnation of Tellurium in Copper Bidlion^ 



Cabell Whitehead. 

 The Use of Sidphurous Acid ( HNaSOs) in 



Manufacture of Glocose Synip and Grape- 



Sugar: Horace E. Horton. 

 The Furfural- Yielding Constituents of Plants : 



C. F. Cross, E. J. BEVANand C. Beadle. 

 The Separation of Solid and Liquid Fatty Acids : 



E. TWITCHELL. 



Improved Methods of Water Analysis : Irving 



A. Bachman. 

 A Cheap Form of Self-Regidating Gas Gener- 

 ator : W. W. Andrews. 

 Some of the Properties of Calcium Carbide : F. 



P. Venable and Thomas Clarke. 

 Note on the Determination of Zinc : P. W. 



Shimer. 

 On the Determination of Cane-Sugar in the 



Presence of Commercial Glucose: H. A. 



Weber and William McPherson. 

 On the Action of Acetic and Hydrochloric Adds 



on Sucrose : H. A. Weber and William 



McPherson. 

 Method of Determining Chromium in Chrome 



Ore: Edmund Clark. 

 New Books; Notes. 



NEW BOOKS. 



Manual of Geology. James D.Dana. Fourth 

 Edition. New York, American Book 

 Co. 1895. Pp. 1087. 



A Course of Elementary Practical Bacteriology. 

 A. A. Kanthack and J. H. Drysdale. 

 London and New York, Macroillan & 

 Co. 1895. Pp. xxii+181. $1.10. 



Elementary Biology. Emanuel R. Boyee. 

 Boston, D. C. Heath & Co. Pp. xxi + 

 235. 



The Geological and Natural History Survey of 

 Minnesota. N. H. Winchell. Minne- 

 apolis, Harrison & Smith. 1895. Pp. 

 254. 



