A proposed standard method of testing oil-shales for their crude oil yield

Because so little is known regarding the oil-shales of this country and their properties, a great many delays were incurred in obtaining the information contained herein. Much preliminary work had to be done before a satisfactory study of analytical retorting of oil shales could even begin. In the course of this preliminary work a great deal of information was obtained, not included in this paper, that can well be used in further work on oil shales. The information gained in the preliminary studies will be included in a future publication of the U.S. Bureau of Mines.