560 Scientific Intelligence. 



Hartford, 1910. — This important work has been carried through 

 by the above-named committee of the Connecticut Botanical 

 Society without personal compensation, the State contributing 

 $300 for incidental expenses. It gives a complete list, according 

 to present knowledge, of the flowering plants and ferns growing 

 without cultivation within the limits of the state ; the names are, 

 in general, those of the seventh edition of Gray's Manual. This 

 list includes 1948 flowering plants and ferns ; of these 1487 are 

 believed to be native to the state and 461 to have been intro- 

 duced by man either designedly or by accident. In addition there 

 are numerous forms distinct enough to receive names although 

 not given specific rank, bringing the total number of plants named 

 in the book to 2228. The introduction gives an interesting his- 

 tory of botanical investigation in the state, beginning with that 

 of Dr. Levi Ives (1819), and continued by many active workers ; 

 an appendix includes a statistical summary of the plants of Con- 

 necticut. Teachers of botany and all interested in our native 

 plants will welcome this thorough and carefully prepared volume. 

 Copies may be obtained from the State Librarian for seventy-five 

 cents, or gratuitously, where needed by scientific men or teachers 

 for professional use. 



3. Kraft das ist animalische, mechanische, soziale Energien 

 und deren Pedeutung fur die Machtenfaltung der Staaten; von 

 Prof. Dr. E. Reyer. Zweite Auflage. Pp. vii, 471, Leipzig 

 (Wilhelm Engelmann), 1909. 



Soziale Mdchte als Ergdnzung der Arbeit uber " Kraft " / von 

 E. Reyer. Pp. Ill, 34 figures. — Readers of the earlier edition 

 (see v. xxvii, 272) of Dr. Reyer's thoughtful discussion of this 

 broad and important subject will be glad of this new edition, which 

 takes into account the many recent factors in modern industrial 

 progress. 



4. Publications of the Alleghany Observatory of the Univer- 

 sity of Pittsburgh. — The following memoir of vol. I has recently 

 been distributed. 



No. 21. A Comparative Study of Spectroscopic Binaries ; by 

 Frank Schlesinger and Robert H. Baker. Pp. 135-161. 



5. Bulletin of the University of Kansas. — The following has 

 been recently issued: Engineering Bulletin No. 1 (vol. xi, No. 1), 

 A Ballistic Electro-Dynamometer Method of Measuring Hyste- 

 resis Loss in Iron ; by Martin E. Rice and Burton McCollum. 

 Pp. 23, with 5 figs. Lawrence. 



The Philosophy of Happiness : A Consideration of Normalism ; by E. 

 Waite Joslyn. Pp. 200. Elgin, 111. (Normalist Publishing Co.) 



La Vita Delia Eicchezza ; by Emanuele Sella. Pp. 252. Turin, 1910. 

 (Fratelli Bocca, Editori.) 



