LABORATORY PHYSICS 



Hammers Observation Blanks in Physics 



By WILLIAM C. A. HAMMEL, Professor of Physics in 

 Maryland State School. Boards, Quarto, 42 pages. 

 Illustrated. ...... 30 cents 



These Observation Blanks are designed for use as a 

 Pupil's Laboratory Manual and Note Book for the first 

 term's work in the study of Physics. They combine in 

 convenient form descriptions and illustrations of the appa- 

 ratus required for making experiments in Physics, with 

 special reference to the elements of Air, Liquids, and Heat; 

 directions for making the required apparatus from simple 

 inexpensive materials, and for performing the experiments, 

 etc. The book is supplied with blanks for making drawings 

 of the-apparatus and for the pupil to record what he has 

 observed and inferred concerning the experiment and the 

 principle illustrated. 



The experiments are carefully selected in the light of 

 experience -and arranged in logical order. The treatment 

 throughout is in accordance with the best laboratory practice 

 of ihefiday." 



Hon. W. T. Harris, U, S. Commissioner of Education, 

 says of these Blanks: 



"I have seen several attempts to assist the work of 

 pupils engaged in the study of Physics, but I have never 

 seen anything which promises to be of such practical assist- 

 ance as Hammel's Observation Blanks." 



Specimen copies of the above book will be sent prepaid to any address, 

 on receipt of the price \ by the Publishers : 



American Book Company 



New York Cincinnati * Chicago 



