even though made with inferior paint, generally afford excellent protection to steel because the paint was applied to the metal when it was clean and warm.

When painting is to be done in the field, or under conditions that make it impracticable to warm and dry the metal artificially, it is a good plan to apply paint heated to a temperature of about 150° F., especially when the temperature of the atmosphere is below 55° F. This warming of paint may be attained by placing the pails of paint in vessels of hot water. It is important that one should always note the atmospheric conditions when the work of painting is being done. A temperature of about 70° F. and an atmosphere that is free from moisture favor the right kind of drying. The  humidity  of  the  atmosphere  is  even  more  important than its temperature. Nothing