The Hydrogenation Of Bituminous Coal

The Principle of the Process Simply Explained and a Synopsis of a Paper Recently Presented to Members of the World Petroleum Congress by a Member of the I.C.I. Technical Staff......

Testing Sparking Plugs Under Pressure: A New Bosch Apparatus

T HERE is no disputing the fact that the usual rule-of-thumb methods of testing sparking plugs give a most uncertain indication of the condition of the plug. A handy device has......