J G Lawn

DISCUSSION. THE DESIGN AND TESTING OF CENTRIFUGAL FANS.

Sir B Baker, R C Parsons, C H Wingfield, 1896 .

DISCUSSION. SOME METHODS OF GOLD-MINING.

H C Jenkins, J G Lawn, T H Bailey, 1931 .

CORRESPONDENCE. THE CONCENTRATION AND SIZING OF CRUSHED MATERIALS.

Ro, B H Brough, J G Lawn, .