29th September 1939, Page 31
29th September 1939
Page 31

Page 31, 29th September 1939
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An Amphibious Track-layer A Single Propulsion System
Emergencies Frequently Call for Vehicles of Specialized Type. The Roebling Amphibian is Designed to Meet Contingencies on Land, Sea or Swampy Undeveloped Terrain admirably the......
An Air Filter Of High Efficiency
' is not, perhaps, always realized hat from 90 to 98 per cent, of the nbustible mixture in an engine is ; therefore it would seem of some portance to ensure that, before it >ses......