PHYSICAL SCIENCE. 33 



A Third Edition of these popular Lectures, containing all the most 

 recent discoveries and several additional illustrations. "In six 

 lectures he has given the history of the discovery and set forth the 

 facts relating to the analysis of light in such a way that any reader 

 of ordinary intelligence and information will be able to understand 

 what 'Spectrum Analysis' is, and what are its claims to rank 

 among the most signal triumphs of science" Nonconformist. 

 "The lectures themselves furnish a most admirable elementary 

 treatise on the subject, whilst by the insertion in appendices to each 

 lecture of extracts from the most important published memoirs, the 

 author has rendered it equally valuable as a text-book for advanced 

 students." Westminster Review. 



Roscoe and Jones. THE OWENS COLLEGE JUNIOR 



COURSE OF PRACTICAL CHEMISTRY. By Professor 

 ROSCOE and FRANCIS JONES, Chemical Master in the Grammar 

 School, Manchester. i8mo. with Illustrations. 2s. 6d. 



Stewart (B.) LESSONS IN ELEMENTARY PHYSICS. 

 By BALFOUR STEWART, F.R.S., Professor of Natural Philosophy 

 in Owens College, Manchester. With numerous Illustrations and 

 Chromolithos of the Spectra of the Sun, Stars, and Nebulae. New 

 Edition. i8mo. 4^. 6d. 



A description, in an elementary manner, of the most important oj 

 those laws which regulate the phenomena of nature. The active 

 agents, heat? light, electricity, etc., are regarded as varieties of 

 energy, and the work is so arranged that their relation to one 

 another, looked at in this light, and the paramount importance oj 

 the laws of energy, are clearly brought out. The volume contains 

 all the necessary illustrations. The Educational Times calls this 

 "the beau-ideal of a scientific text-book, clear, accurate, and 

 thorough" 



Thudichum and Dupre. A TREATISE ON THE 



ORIGIN, NATURE, AND VARIETIES OF WINE. 



Being a Complete Manual of Viticulture and CEnology. By. J. L. 



W. THUDICHUM, M.D., and AUGUST DUPRE, Ph.D., Lecturer on 



Chemistry at Westminster Hospital. Medium 8vo. cloth gilt. 25*. 



In this elaborate 'work the subject of the manufacture of wine is 

 treated scientifically in minute detail, from every point of view. A 

 chapter is devoted to the Origin and Physiology of Vines, two to the 



