22 SCIENTIFIC CATALOGUE. 



real nature both of matter and ether, and the laws of mutual action 

 which must be supposed to exist between them. He then endeavours 

 to trace out the main consequences of the fundamental hypothesis, 

 and their correspondence with the known phenomena of physical 

 change. 



Blanford (W. T.)— GEOLOGY AND ZOOLOGY OF 

 ABYSSINIA. By W. T. Blanford. Svo. 2U. 



This zvork contains an account of the Geological and Zoological Obser- 

 vations made by the author in Abyssinia, when accompanying the 

 British Army on its march to Magdala and back in 1S68, and 

 during a short journey in Northern Abyssinia, after the departure 

 of the troops. Part I. Personal Narrative; Part II. Geology; 

 Part III. Zoology. With Coloured Illustrations and Geological 

 Map. "The result of his labours," the Academy says, "is an 

 important contribution to the natural history of the country." 



Cooke (Josiah P., Jun.)— first PRINCIPLES OF 

 CHEMICAL PHILOSOPHY. By Josiah P. Cooke, Jan., 

 Ervine Professor of Chemistry and Mineralogy in Harvard College. 

 Crown 8vo. 12s. 



The object of the author in this book is to present the philosophy of 

 Chemistry in such a form that it can be made with profit the subject 

 of College recitations, and furnish the teacher with the means of 

 testing the student's faithfulness and ability. With this view the 

 subject has been developed in a logical order, and the principles oj 

 the science are taught independently of the expo imental evidence on 

 which they rest. 



Cooke (M. C.)— HANDBOOK OF BRITISH FUNGI, 



with full descriptions of all the Species, and Illustrations of the 

 Genera. By M. C. COOKE, M.A. Two vols, crown Svo. 24s-. 



During the thirty-five years that have elapsed since the appearance of 

 the last complete Myco/ogic Flora no attempt has been made to revise 

 it, to incorporate species since discovered, and to bring it up to the 

 standard of modern science. No apology, therefore, is necessary jor 

 the present effort, since all will admit that the want of such a 



