December 13, 1901.] 



SCIENCE. 



933 



show that, although the bloods of various ani- 

 mals may be mixed, they may be detected 

 and differentiated. The final paper, by W. J. 

 Kent, is on ' The Colors of the Crayfish ' : red 

 may be caused by exposure to sunlight or by 

 environment, but all other colors are the result 

 of environment and are protective in their na- 

 ture. 



The Osprey for September contains the ' Song 

 Birds of the Kissimmee Valley, Florida,' by 

 Wm. Palmer, ' A Visit to Otter Rock, Pacific 

 Ocean,' by A. G. Prill; 'Notes on the Blue 

 Grosbeak, Guiraca ccerulea,' by John W. 

 Daniel, Jr.; the tenth instalment of 'William 

 Swainson and His Times,' by Theodore Gill ; 

 a second paper on ' The Cage Birds of Calcutta,' 

 by Frank Finn ; and the eighth ahd'final chap- 

 ter of ' The Osprey or Fishhawk : Its Charac- 

 teristics and Habits,' by Theo.dqre Gill. An 

 editorial on ' Work and Worry for the Classic- 

 ists ' shows some of the numerous troubles in 

 store for those zoologists who propose to abide 

 by the decision of the majority, in regard to 

 nomenclature, at the last international zoolog- 

 ical congress. 



The Plant World for October contains the 

 second part of 'Notes on Trees of Cuba,' by 

 Valery Havard ; ' Some Interesting Cases of 

 Plant Distribution,' by John M. Holzinger ; 

 ' The Knubble, Advice to Beginners in Botany,' 

 by Walter Deane ; and many briefer articles and 

 notes on current literature. The supplement on 

 the 'Families of Flowering Plants,' by Charles 

 L. Pollard, is devoted to a continuation of the 

 descriptions of the families of the order Sapin- 

 dales. 



The American Museum Journal for October 

 should be in demand by ornithologists, for it has 

 for supplement a twenty-four-page ' leaflet ' de- 

 voted to the Bird Rock Group recently placed 

 on exhibition. This is by Mr. Chapman, and is 

 admirably illustrated by reproductions of the 

 group and of the real Bird Rock whose bird life 

 it so well represents. The Journal proper con- 

 tains notes on the summer's work of the various 

 field parties of the Museum, and on the recent 

 acquisitions. 



Journal of Physical Chemistry, October. ' On 

 the First Plait in van der Waals's Free Energy 



Surface for Mixtures of Two Substances,' by 

 Ch. M. A. Ha^-tman (Physical Laboi'atory, Lei- 

 den). This contains a review of the investiga- 

 tions referring to binary mixtures and a bib- 

 liography. ' A New Proof of the Formula 



d = "-^^,'by Felix Lengfeld. 'The Influ- 



ence of Electrical Waves on Chemical Action,' 

 by Felix Lengfeld and James H. Ransom. ' On 

 the Dielectric Constants of Pure Solvents,' by 

 Herman Schlundt. The work of Dr. Schlundt 

 was carried out under the supervision of Pro- 

 fessor Kahlenberg, of the University of Wis- 

 consin, and while a number of new examples 

 Tiave been found which follow the Nernst- 

 Thomson rule, that the greater the dielectric 

 constant of a solvent the greater is its disso- 

 ciating power, some striking exceptions have 

 also been found, from which it is argued that 

 the rule is inadequate. 



SOCIETIES AND ACADEMIES. 



CALENDAR. 



The American Association for the Advancement 

 of Science. A meeting of the council will be held 

 at the Quadrangle Club, University of Chicago, 

 on the afternoon of January 1. Section H 

 (Anthropology) will meet at the Field Colum- 

 bian Museum, Chicago (December 31 and Jan- 

 uary 1). The next regular meeting of the As- 

 sociation will be held at Pittsburg, Pa. (June 28 

 to July 3). A winter meeting is planned to be 

 held at Washington during the convocation 

 week of 1902-3. 



The American Society of Naturalists will hold 

 its annual meeting at the University of Chicago 

 (December 31 and January 1). In conjunction 

 with it will meet the Naturalists of the Central 

 States and several affiliated societies, including 

 The American Morphological Society (beginning 

 on January 1 ; The American Physiological So- 

 ciety (December 30 and 31) ; The American 

 Psychological Association and the Western 

 Philosophical Association (December 31 and 

 January 1 and 2) ; The Society of American 

 Bacteriologists (December 31 and January 1), 

 and The American Association of Anatomists 

 (December 31 and January 1 and 2). 



