Patent for apparatus and improving practices associated with distillation of petroleum as undistilled residues, as well as petroleum in other forms.

Semi-monthly publication of the Boy Scouts of America, written for Boy Scout leaders, officials, and others interested in the work of the Scouts. It includes articles about events and activities, updates from the national headquarters, topical columns and essays, and news from various chapters nationwide.

Semi-monthly publication of the Boy Scouts of America, written for Boy Scout leaders, officials, and others interested in the work of the Scouts. It includes articles about events and activities, updates from the national headquarters, topical columns and essays, and news from various chapters nationwide.

Technical paper issued by the Bureau of Mines over studies on metallurgical coke. As stated in the introduction, "in this paper the attempt is made to summarize the history of coke making in the United States, to indicate the development of different methods and the modern types of ovens, and to point out the composition and physical properties of the metallurgical cokes produced in this country" (p. 5). This paper includes tables, illustrations, photographs, and a map.