Heavy green oak timbers for wagons and wheels were dried in the kiln in ninety to one hundred days.

It would have taken two years to cure this material outdoors.
By their valuable test work, scientists are devising efficient means of protecting wood against decay.

They treat the woods with such chemicals as creosote, zinc chloride and other preservatives.

The life of the average railroad tie is at least doubled by such treatment.

We could save about one and one-half billion board feet of valuable hardwood lumber annually if all the 85,000,000 untreated railroad ties now in use could be protected in this manner.