Roberts , Arthur <br/><br/>
Reader Beacons 
Arthur Reader 
 - New York   McGraw Hill book Company  1947 
 - 489pages 
<br/><br/> Pg mean Physics General & Mechanics Page 457-464 in A to Z Accession Register (Acc. No. Pg1-Pg228) & Page 640 (Acc. No. 224-231) 
<br/><br/><label>Dewey Class. No.: </label>PG212