Pulverulent zinc is mixed with oil and a dryer, and the mixture is applied with a brush. For ordinary exposure, one coating of this mixture is affirmed to be sufficient, but a double coat, it is claimed, will afford a sure protection against both the atmosphere and sea water. A good formula for this zinc paint is the following: Zinc in powder, 8 parts; oil, 71 parts; dryers, 2 parts. The mixture should be prepared freshly, and only so much made as is required for the time. The zinc coating imparts to the iron a steel-grey color, and does not interfere with the application of another coat of paint. - English Mechanic.