SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE, PUBLISHING THE 



OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN ASSOCIATION 



FOR THE ADVANCEMENT OF SCIENCE 



Peidat, August 16, 1907 

 contents 



Address of the President of the British Asso- 

 ciation for the Advancement of Science: 

 SiE David Gill 193 



Scientific Books: — ■ 

 Le Blanc's Text-took of Electro-chemistry : 

 Pkofessor Jos. W. Richards. Jackson's 

 Tropical Medicine: Dk. James W. Jobling 212 



Discussion and Correspondence: — 



Ore the Effects of Magnesium Sulphate on 

 the Growth of Seedlings: Dk. William J. 

 GiES. A Note on Certain Widely Distrib- 

 uted Leaf hoppers: G. W. Kikkaldy 214 



Special Articles: — 



Color Inheritance and Sex Inheritance in 

 Certain Aphids: N. M. Stevens. A Color 

 Sport among the Locustidce: De. A. Frank- 

 lin Shull. Gymnosporangium Macropus : 

 Professor F. D. Heald. A Blight Disease 

 of Young Conifers: Dr. Perij:y Spattlding. 

 Normal Faulting in the Bullfrog District: 

 W. H. Emmons 216 



Quotations : — 

 The Nolel Prizes 222 



Current Notes on Land Forms: — ■ 



Pit Craters in Mexico; Batoka Gorge of the 

 Zamhesi; A Peneplain in South Africa: 

 W. M. D 226 



Dedication of the Aldrovandi Museum of the 

 University of Bologna : G. E. W 228 



Centenary of the Geological Society 228 



Sir Joseph Hooker's Ninetieth Birthday .... 229 



Scientific Notes and News 229 



University and Educational Neivs 232 



MSS. intended for publication and books, etc., intended for 

 reTiew should be sent to tbe Editor of Science, Garrison-on- 

 KudsoB. N. Y. 



ADDRESS OF TBE PRESIDENT OF THE 



BRITISH ASSOCIATION FOR THE 



ADVANCEMENT OF SCIENCE'- 



To-night, for the first time in its history, 

 the British Association meets in the ancient 

 city of Leicester; and it now becomes my 

 privilege to convey to you, Mr. Mayor, and 

 to the citizens generally, an expression of 

 our thanks for your kind invitation and for 

 the hospitable reception which you have 

 accorded to us. 



Here in Leicester and last year in York 

 the association has followed its usual cus- 

 tom of holding its annual meeting some- 

 where in the United Kingdom; but in 

 1905 the meeting was, as you know, held 

 in South Africa. Now, having myself 

 only recently come from the Cape, I wish to 

 take this opportunity of saying that this 

 southern visit of the association has, in my 

 opinion, been productive of much good; 

 wider interest in science has been created 

 amongst colonists, juster estimates of the 

 country and its problems have been formed 

 on the part of the visitors, and personal 

 friendships and interchange of ideas be- 

 tween thinking men in South Africa and at 

 home have arisen which can not fail to have 

 a beneficial influence on the social, poli- 

 tical and scientific relations between these 

 colonies and the mother country. We may 

 confidently look for like results from the 

 proposed visit of the association to Canada 

 in 1909. 



One is tempted to take advantage of the 

 wide publicity given to words from this 



' Leicester, 1907. 



