TY  - BOOK
AU  - STREWART BALFOUR 
TI  - PRACTICAL PHYSICS 
U1  - PG87 
PY  - 1902///
KW  - PHYSICS
N1  - Pg mean Physics General & Mechanics Page 457-464 in A to Z Accession Register (Acc. No. Pg1-Pg228) & Page 640 (Acc. No. 224-231)
ER  -