IMPORTANT 



SCIENTIFIC WORKS. 



APPLETONS' CYCLOPAEDIA OF APPLIED MECHAN- 

 ICS, A Dictionary of Mechanical Engineering and the Mechan- 

 ical Arts. Illustrated by 5,000 Engravings. Edited by Park 

 Benjamin, Ph.D. 2 vols., 8vo. Sheep, $15.00; half morocco, 

 $17.00. 

 Appletoxs' Cyclopedia of Applied Mechanics of 1S79 is a new 

 work, and not a revision of the former Dictionary of Mechanics of 1850. 

 It presents the best and latest American practice in the mechanical arts, 

 and compares the same with that of other nations. It also exhibits the 

 extent to which American invention and discovery have contributed to the 

 world's progress during the last quarter century. The contributors include 

 many of the most eminent American mechanical experts and engineers. 

 Several of their contributions contain the results of original research and 

 thought never before published. Their efforts have in all cases tended to 

 simplify the subjects treated, to avoid technicalities, and so to render all 

 that is presented easily understood by the general reader as well as by 

 the mechanical student. Examples are appended to all rules, explanations 

 to all tables, and in such matters as the uses of tools and management 

 of machines the instructions are unusually minute and accurate. 



II. 

 Arnott, Neil. Elements of Physics ; or, Natural Philosophy. Sev- 

 enth edition. 12mo. Cloth, $3.00. 



in. 

 Bourne, John. A Catechism of the Steam-Engine. New revised 

 edition, with Illustrations. 12mo. Cloth, $1.75. 



rv. 

 Bourne, John. Hand-Book of the Steam-Engine. Constituting a 

 Key to the " Catechism of the Steam-Engine." Illustrated with 

 67 Woodcuts. 12mo. Cloth, $1.75. 



