11 



SCIENCE.— AD YERTISEMENTS. 



NEW BOOK 



BY. 



Sir John Lubbock, 



No^v Ready, 



The Scenery of Switzerland, 



And the Causes to which it is Due. 



By the Right Hon. Sir John Lubbock, Bart., M. P., 

 F. R. S., D. C, L., LL. D. With Numerous 

 Plans and Illustrations. i2mo., cloth, $1.50. 



This Yoliime comes out appropriately at a time 

 ■when English and American travellers are already 

 beginning to think of seeking the invigorating air of 

 the Swiss Alps. It will no doubt become a favorite 

 companion to thousands of travellers during the sea- 

 son, and be hardly less welcome at other times of the 

 year as a reminder of past pleasures, or to those who 

 have not yet visited Switzerland — as a delightlul 

 foretaste of what is to come. The book is scientific 

 in character, but the subjects are handled in the pop- 

 ular style which so many readers have learned to as- 

 sociate Avith Sir John Lubbock's name. The titles of 

 a few chapters will give an idea of the contents : The 

 Geology of Switzerland, The Origin of Mountains, 

 Snow and Ice Glaciers, Valleys, Lakes, Action of 

 Eivers, Influence of Strata upon Scenery, The Valais, 

 Jura, Bernese Oberland, etc. 



BY THE SAME AUTHOR. UNIFORM 

 WITH THE ABOVE 



THE BEAUTIES OF NATURE and the Wonders 

 of the World We Live In. With numerous Illus- 

 trations. 12mo, cloth, $1.50. 



THE USE OF LIFE. 12mo, cloth, $1.25. 



THE PLEASURES OF LIFE. 2 parts in one vol. 

 12mo, cloth, $1.25. 



The IVlacmillan Company, 



66 Fifth Ave., NEW YORK. 



Horsford's Acid Phosphate 



with water and sugar only, makes a 

 delicious, healthful and invigorating 

 drink. 



Allays the thirst, aids digestion, and 

 relieves the lassitude so common in 

 midsummer. 



Dr. M. H. Henry, New York, says: "When 

 completely tired out by prolonged wakefulness 

 and overwork it is of the greatest value to me. 

 As a beverage it possesses charms beyond any- 

 thing I know of in the form of medicine." 



Descriptive pamphlet free. 



Rumford Chemical Works, Providence, R. I. 



Bewrare of Substitutes and Imitations. 



NEW CATALOGUE. 



We have recently issued a new edition, revised and 

 enlarged to 64 pages, of our Catalogue of 



Books on Chemistry, Chemical 

 Technology in Physics. 



It is arranged by subjects, and includes all the 

 standard books in Chemical and Physical Science, as 

 well as the recent literature up to date. 



A copy of this Catalogue will be sent free by mail 

 to any address. 



D. Van Nosrand Company, 



Publishers and Importers of Scientific Books, 

 23 Murray St. and 27 Warren Sjt., New York. 



WORKSHOP RECEIPTS. 



A REFERENCE BOOK FOR SCIENTIFIC AMATEURS. 

 Send for Descriptive Circulars. 



SPON & CHAMBERLAIN, Publishers, 



12 CORTLANDT ST.. NEW YORK. 



"MINERALS AND HOW TO STUDY THEM." 



Prof. E. S. DANA'S new book for beginners in Mineralogy simplifies the science and makes it a 

 fascinating study. To quickly introduce the work we offer it at 20 per cent, discount to- 

 readers mentioning this journal, viz., $i.zo, postage loc. extra. For COLLECTIONS OF 

 MINERALS to illustrate the book send for our special circular. 



124-page Illustrated Catalogue, 25c. in paper, 50c. in cloth. 



44-page Illustrated Price-Lists, 4c. ; Bulletins and Circulars Free. 



GEO. L. ENGLISH & CO., Mineralogists, 64 East 12th St., New York. 



