Penrose, H. E. <br/><br/>
Magnetism and electricity :  for home study / 
H. E. Penrose 
 - 2nd ed. 
 - London :  Wireless Press,  1919 
 - vii,i, 647 p. :  ill.. ;  20 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetism<br/>Electricity
<br/><br/><label>Dewey Class. No.: </label>537