36 



SCIENCE. 



[N. S. Vol. XII. No. ; 



BOOKS EECEIVED. 



Photomeirie Measurements. Wilbde M. Stone. New 

 York and London. The Macmillan Co. 1900. Pp. 

 Yii + 270. $1.60. 



A Manual of Elementary Practical Physics for High 

 Schools- Julius Hoetvet. Minneapolis, H. W. 

 Wilson. 1900. Pp. x + 255. 



Comparative Anatomy of Animals. Gilbeet C. Bowne. 

 London, George Bell & Sons. 1900. New York, 

 The Macmillan Co. 1900. Pp. xvi + 269. 



SCIENTIFIC JOURNALS AND ARTICLES. 



The American Naturalist for June opens with 

 an excellent account of ' The Neurone Theory 

 in the Light of Recent Discoveries,' by G. H. 

 Parker, originally given as a lecture before the 

 Section of Biology, New York Academy of Sci- 

 ences. ' Variation in the Venation of Trimero- 

 tropis,' is discussed by Jerome McNeil, with 

 the rather surprising conclusion, among others, 

 that variations in venation may be much greater 

 within a species, than those difference which 

 distinguish one genus from another. Robert 

 T. Young presents some ' Notes on the Mam- 

 mals of Prince Edward's Island,' and T. D. A. 

 Cockerell notices ' The Cactus Bees, Genus 

 Lithurgiis' recorded from New Mexico. C. B. 

 Davenport summarizes ' The Advance of Bi- 

 ology in 1897' as indicated by the contents of 

 U Annee biologique for that year and F. W. Si- 

 monds has a paper, presented before the Amer- 

 ican Association last August, ' On the Interpre- 

 tation of Unusual Events in Geologic Records, 

 illustrated by Recent Examples.' Part X of 

 the ' Synopses of North American Invertebrates' 

 is by Mary J. Rathbun and is devoted to ' The 

 Oxyrhynchous and Oxystomatous Crabs. ' 



The Popular Science Monthly for July has for 

 its frontispiece a portrait of G. K. Gilbert. 

 Simon Newcomb has some ' Chapters on Stars' 

 and W. M. Haflfkine gives the second and final 

 part of his very interesting article on ' Preven- 

 tive Inoculation.' James Collier presents the 

 second of his papers on ' Colonies and the 

 Mother Country' and G. F. Swain gives an ac- 

 count of ' Technical Education at the Massa- 

 chusetts Institute of Technology,' which in- 

 cludes the history of the institution in brief and 

 is illustrated by views of the laboratories and 

 portraits of its various Presidents. G. T. W. 



Patrick discusses ' The Psychology of Crazes, ' 

 concluding that ethically and intellectually 

 social or collective man is far behind individual 

 man. Edward Renouf considers ' Some Phases 

 of the Earth's Development in the Light 

 of Recent Chemical Research,' and S. P. Lang- 

 ley contributes ' A Preliminary Account of the 

 Solar Eclipse of May 28, 1900, as observed by 

 the Smithsonian Expedition.' ' Malaria and 

 the Malarial Parasite,' by Patrick Manson, gives 

 a good resume of the subject, and finally Henry 

 Carrington Bolton briefly notices ' New Sources 

 of Light and of Rontgen Rays.' Under Dis- 

 cussion and Correspondence, Charles D. Wal- 

 cott tells of ' Washington as an Explorer and 

 Surveyor,' while the thanks of the many are 

 due to ' Physicist ', who under the caption ' Sci- 

 ence and Fiction' reviews Tesla's recent article 

 in the Century. 



The Osprey for May, rather belated, begins 

 with part V of 'Birds of the Road,' by Paul 

 Bartsch, followed by ' Notes on the Habits of 

 the Blue Jay in Maine,' by J. Merton Swain. 

 Theodore Gill gives the third instalment of 

 'William Swainson and his Times,' which con- 

 tains some important information regarding his 

 publications. M. A. Carpenter, Jr., describes 

 ' The Chickadee {Parus atricapillus) in Eastern 

 Nebraska' and some ' Remarks on Some of the 

 Birds of the Cape of Good Hope,' by Phillip 

 Lutley Sclater is reprinted from the Ibis. 



SOCIETIES AND ACADEMIES. 

 TOEREY BOTANICAL CLUB. 



On May 30, 1900, a meeting was held at 

 Hazelwood, the residence of Vice-President Dr. 

 T. F. Allen, near Litchfield, Conn., subsequent 

 to a field excursion arranged by Dr. Allen in 

 the vicinity of Litchfield, the Club being his 

 guests from May 29th to 31st. 



Professor Lloyd called attention to the occur- 

 rence of nectaries* on the leaves of Pteris aquil- 

 ina. The glands are found on the rachis, one 

 below the insertion of each pinna, and may be 

 recognized as modified oval areas covered by a 

 dark red epidermis. The color is due to the 

 presence of matter dissolved in the sap, and is 



* Described briefly by Francis Darwin in Jour. 

 Linn. Soc, 15 : 407. 1877. 



