472 Scientific Intelligence. 



described in illustration. One chapter embraces velocity-ratio 

 diagrams and approximate solutions of link motions. Valve 

 and steering gears, together with various link motions, are given 

 here to exemplify. Another chapter is devoted to acceleration 

 diagrams, which with the velocity-ratio diagrams, are most im- 

 portant in the study of the dynamics of machines. The subject 

 of toothed circular and non-circular wheels is comprised in the 

 last half of the book. The kinematic conditions which must 

 be satisfied by profiles of teeth and methods mechanical and 

 graphical for determining their shapes are fully given. Prob- 

 lems illustrate the text throughout. For a lecture course on the 

 kinematics of machines this book would make an accompaniment 

 for which it is well adapted. c. b. r. 



6. British Museum of Natural History : Guide to the Gallery 

 of Birds in the Department of Zoology. 228 pp., with 24 plates 

 and illustrations. London, 1905. — This guide has been prepared 

 by Mr. W. R. Ogilvie-Grant, Assistant in the Zoological Depart- 

 ment, who has also carried out the arrangement of the collections 

 as now exhibited. An appendix is added on the structure of 

 birds with illustrations of the feathers and skeleton. The numer- 

 ous full-page plates give reproductions of excellent photographs 

 of actual specimens in the gallery. To those who have not had 

 the opportunity to learn by actual visit the riches of the Museum 

 they will give a good idea of the admirable results attained in 

 the representation of birds in their natural surroundings. 



7. Catalogue of the Lepidoptera Phcdcence in the British Museum, 

 Vol. V. Catalogue of the Noctuidm y by Sir George F. Hampson. 

 Pp. xvi, 634, with plates lxxviii-xcv. London, 1905. — The pub- 

 lication of the fourth volume of this important work was noticed 

 in the number for February, 1904. The present volume embraces 

 the classification of the Hadeninae, the second of the fifteen sub- 

 families of the Noctuidae ; 946 species belonging to 78 genera 

 are described. This subfamily is characterized by its trifid 

 neuration of the hind wing, combined with the hairy clothing of 

 the eyes. 



8. Geographen-Kalender y in Verbindung mit vielen Fachge- 

 nossen herausgegeben von Dr. Hermann Haack. Dritter Jahr- 

 gang, 1905-1906. 468 pp. Gotha, 1905 (Justus Perthes).— The 

 third issue of this useful calendar contains the good features of 

 its predecessors with some additions and emendations. The 

 address list of geographers and those in allied departments has 

 been much enlarged and made more accurate. The literature of 

 the year 1904 is fully treated, as also the necrology ; further, a 

 brief summary is given of interesting events illustrated by a 

 series of sixteen maps. A portrait of Jacques-Elisee Reclus 

 forms the frontispiece. 



9. Publications of the Carnegie Institution. — The following 

 papers have been recently issued : 



No. 23. Heredity of Coat Characters in Guinea-Pigs and Rab- 

 bits ; by W. E. Castle. 78 pp., 6 plates (Papers of Station for 

 Experimental Evolution at Cold Spring Harbor, N. Y., No. 1). 



