NEW BIOLOGICAL BOOKS 



435 



senior author's predilections greater space 

 and much more adequate treatment than 

 is usual in textbooks fall to the functional 

 as contrasted with the morphological 

 aspects of general biology. It is a bril- 

 liantly written volume, which will find 

 perhaps even greater usefulness as an 

 introduction to the subject for the adult 

 layman, than as a school textbook, though 

 in the latter role its position is outstanding. 



THE EFFECT OF AQUEOUS EXTRACTS 

 OF TAR ON DEVELOPING TROUT 

 OVA AND ON ALEVINS. Fishery In- 

 vestigations. Series I. Vol. III. No. z. 

 By A. C. Gardiner. H. M. Stationery Office 

 is. 3d. -]\ x iof ; 14 (paper) London 

 One volume of Road Board Tar was 

 agitated for 18 hours with 3 volumes of 

 water to form a stock solution. One part 

 of stock solution to 10 volumes and to 50 

 volumes of water formed strong and dilute 

 test solutions. The results showed that 

 such tar extracts were wholly without 

 effect upon ova and very young fry, but 

 with advancing age the susceptibility to 

 poisoning increases, so that fry 110-115 

 days old could not stand more than 15 

 minutes immersion in a solution of 

 40/100,000 phenol. Even so they had 

 greater resistance than yearling trout. 



and results of tissue culture in vitro. 

 There are 71 illustrations, and an extensive 

 bibliography, covering some 4Z closely 

 printed pages. 



UBER DEN TOD. 



By Georg Perthes. Ferdinand Enke 



z.8o marks Stuttgart 



6| x 9I; 73 (paper) 

 The second edition of a pamphlet which 

 contains two essays on the general subject 

 of senescence and death. The first is a 

 discussion of the manner of death. The 

 second, which is a posthumous publica- 

 tion, deals with the general biology of 

 death. 



INDEX BIOLOGORUM. Investigates. 

 Lab or at or ia. Periodica. 

 Edited by G. Chr. Hirsch. Julius Springer 

 xj marks 5I x 8|; vi + 545 Berlin 



This is an extraordinarily useful and 

 well-edited international Who's Who of 

 workers in the biological sciences. It 

 seems rather expensive, considering its 

 size and the considerable sale which it is 

 sure to have, but it is well worth the 

 money as a clerical assistant in any labora- 

 tory or library. The sub-title indicates 

 its scope. 



DIE GEWEBEZUCHTUNG IN VITRO. 



By V. Bisceglie and A. Juhds^-Schdffer. 



Julius Springer 

 14 marks (paper) Berlin 



Z5.40 marks (bound) 



5! x 8f ; viii + 355 

 This useful treatise constitutes Volume 

 14 of the series of Monographien aus dem 

 Gesamtgebiet der Physiologie der Pflan%en und 

 der Tiere. It reviews the now extensive 

 literature which exists on the technique 



DE LAMAR LECTURES 19x6-1917. The 

 Johns Hopkins University, School of Hygiene 

 and Public Health. 



The Williams & Wilkins Co. 

 $5.00 6 x 9; ZZ3 Baltimore 



These lectures are chiefly of interest to 

 the public health worker and the medical 

 man. But one will be welcomed by the 

 general biologist. Dr. G. H. F. Nuttall, 

 Quick professor of biology in the Uni- 

 versity of Cambridge, discourses in a most 



