Gray, Andrew,  1847-1925. <br/><br/>
The theory and practice of absolute measurements in electricity and magnetism.   Volume I /  
Andrew Gray  
 - London :   New York :   Macmillan and co.,  1888-93. 
 - 2 v. in 3.  tablas, diagr.  20 cm. 
<br/><br/> Second ed. published in 1921, has title: Absolute measurements in electricity and magnetism. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MEDIDAS ELECTRICAS<br/>MEDIDAS MAGNETICAS
<br/><br/><label>Universal Decimal Class. No.: </label>621.3