A New Means For Avoiding Boiler Scaling.

A Non-chemical Method for which High Claims are Made. T HE scaling of boilers and of large water jackets, etc., obviously causes a gradual diminution of power, a waste of fuel......

On Ship's Work.

Some of the Uses to which Welding Vans are put by Ship Repairing and Engineering Concerns. S EVERAL important fleets of electric welding vans are operated by concerns in the......