In this bulletin Mr. Beal furnishes several new methods for estimating the future output of oil lands and gives curves and other data that should assist oil producers and engineers in determining the probable amount of oil that oil properties in the different fields of the United States will yield. The material is, therefore, presented in two parts. The first part explains in considerable detail the meth ods that should be used in estimating the future production of oil and the manner of applying those methods to the valuation of oil lands; whereas the second gives in detail such information as was available on the ultimate oil recovered in different fields and the usual rate at which the average oil well in each field will produce.