Photograph of brands carved into a desktop at the Rangeland schools.

Document specifying boundary lines, natural and man-made land markers, and the quality of sections of land belonging to the Cienega Ditch Property in Arizona. The distances are measured in units of chains. Arithmetic calculations are handwritten in pencil in the margins of the pages.

Letter from J. L. Wells to Mr. Parramore discussing land survey notes from the Arizona side of the Cienega Ditch property and intentions to obtain more legal data about water rights pertaining to the ditch.

Introduction: "This bulletin discusses ventilation methods, practices, and costs at 11 large copper mines in Arizona, as obtained by brief personal studies and from supplementary information furnished by the mine managements. These mines were visited from December, 1928, to November, 1929, and the methods and practices in use when visited are described in some detail."

From Introduction: "The Bureau of Mines has attempted to develop a cheap and efficient solvent that would especially meet the requirements of smaller plants. (See Bibliography). A method of producing this solution from sulphurous products and waste liquors was developed by the bureau and tried successfully on a test-plant scale at the Southwest Experiment Station in cooperation with the department of mining and metallurgy, University of Arizona, Tuscon, Ariz."

Report issued by the U.S. Bureau of Mines discussing the mining practices and expenses of the United Verde open-pit mine west of Jerome, Arizona. As stated in the introduction, "the purpose of this paper is to present the methods used in developing and operating the mine, and to discuss the problems encountered" (p. 1). This report includes tables, maps, and illustrations.