LESSONS IN PHYSICS 



By LOTHROP D. HIGGINS 



lamo, cloth, 379 pages, illustrated, 90 cents 



HIGGINS'S "Lessons in Physics" provides a thorough course 

 in physics for schools which offer little or no laboratory work. 

 Principles are explained by references to common or familiar phe- 

 nomena rather than to set laboratory experiments. Commercial 

 and industrial uses of the various principles are discussed in con- 

 nection with the principles themselves. 



The author has taken great pains to secure simplicity and clear- 

 ness of expression. The material is arranged to develop a logical 

 succession of ideas, and technical words are in most cases defined 

 when they first appear. For words which are not thus explained 

 a glossary is appended to the text. 



SIMPLE EXPERIMENTS IN 

 PHYSICS 



By LOTHROP D. HIGGINS 



lamo, cloth, 114 pages, illustrated, 35 cents 



/'"YVER three hundred simple exercises designed to provide a 

 ^-J laboratory course for classes in elementary physics. By 

 careful arrangement and by illustrating each successive step with 

 a separate exercise, the manual is made to serve as an efficient 

 guide to the study of principles by observation and thought. It 

 may be used either for a course of study by experiment or to 

 supplement a class-room course. 



1 66 



GINN AND COMPANY PUBLISHERS 



