SCIENCE.— AD VER TISEMENTS. 



McQlLL UNIVERSITY, MONTREAL. 



CHAIR OF CHEMISTRY. 



The Board of Governors is prepared to receive applica- 

 tions for the additional Chair of Chemistry newly instituted 

 hv Mr. W C. McDo' aid. Oindidates should produce evi- 

 dence of special qualifications in Organic Chemistry. Ap- 

 plications, accompanied by any testimonials which the 

 candidate may desire to submit, should be forwarded to the 

 undersigned on or before the 31st March next, 



W. VAUGHAN, Secretary, McGill tjniversity, Montreal. 



Dec. 1, 1896. Just Published. Sixth Edition of 



THE MICROSCOPE ^£^uTe%1'dT- 



By SIMON HENRY QAQE, Professor of Microscopy, His- 

 tology and Embryology in Cornell University and the 

 New York State Veterinary College, Ithaca, N. Y., U.S A. 

 Sixth edition, rewritten, greatly enlarged, and illustrated 

 by 165 figures in the text. Price, $».S0, postpaid. 



COMSTOCK PUBLISHING CO., Ithaca, N. Y. 



Microscopical Material for Sale. 



The undersigned having collected a large number of dif- 

 ferent kinds ot material for the Microscope will sell the same 

 at low prices, and will, if desired, accept other material, 

 etc., desired by me in part payment for above. The above 

 material includes Diatomaceoua deposits. Pollens, Spores, 

 Insect parts. Vegetable parts, etc., and makes a good oppor- 

 tunity for all who prepare and mount their own material. 



."i5 Packages, all different Sl.OO 



100 " " " 2.00 



25 " " " Diatom deposits, . . 1.00 



50 " " " Vegetable parts, etc. 1.00 



Your own choice of above at slightly higher prices. Lists 

 oe. each. Natural History Books, Specimens, etc., for sale. 

 G. R. LUMSDEN, Greenville, Conn. 



Horsford's Acid Phosphate. 



Overworked men and women, the 

 nervous, weak and debilitated, will find 

 in the Acid Phosphate a most agree- 

 able, grateful and harmless stimulant, 

 giving renewed strength and vigor to 

 the entire system. 



Dr. Edwin F. Vose, Portland, Me., says: 

 "I have used it in my own case when suffering 

 from nervous exhaustion, with gratifying re- 

 sults. I have prescribed it for many of the 

 various forms of nervous debility, and it has 

 never failed to do good." 



Desciiptive pamphlet free on application to 

 Rumford Chemical Works, Providence, R. 1. 



Beware of Substitutes and Imitations. 



For sale by all Druggists. 



CHARLES SCRIBNER'S SONS 



HAVE NOW BEADY: 



AUDUBON AND HIS JOURNALS 



1 By MARIA R. AUDUBON, 



# WITH NOTES BY ELLIOTT COUES. 



2 With many Portraits and other Illustrations, including Three hitherto Unpublished Bird Drawings. % 

 I Two Volumes, 8vo, $7.50. 



CONTENTS: Biography — The European Journals, 1826=29 — The Labrador Journal, 

 1833- The Missouri Journals, 1843 — The Episodes. 



" A work of fascinating interest to all ornithologists and bird-lovers, and one which must also appear 

 strongly to the sympathies of the general reader. The story of his romantic life, told briefly in the first volume, 

 is of absorbing interest."— 27ie Auk. 



" Miss Audubon has done her work well and the volumes are read with unfiaggtog interest. Relinquishing 

 the handsome books with their attractive illustrations, the reader feels that at last he has been brought face to 

 face with Audubon, and will remember his traits with ease."— New York Tribune. 



" A publishing year notable for important biographies is not to be allowed to close without one American 

 contribution to the list. The Scribners are to publish this week what will be practically a new Life of Audubon. 

 It is the work of Audubon's granddaughter, with annotations by Elliott Coues, and will contain Audubon's 

 Journals complete for the first time (a part came to light by a happy accident in 1896*, together with . . . 

 three bird drawings not reproduced hitherto. In these days of wide-spread interest in bird lore and of num- 

 berless Audubon Societies, this first full and authentic account of their patron saint should be a most welcome 

 publication."— New Y'ork Evening Post. 



CHARLES SCRIBNER'S SONS, 153=157 Fifth Ave., N. Y. 



