The Occurrence of Gases in Coals (open access)

The Occurrence of Gases in Coals

Report issued by the U.S. Bureau of Mines on the different types of gases that are present in coal. Theories behind why these gases occur in coal are presented. This report includes tables and graphs.
Date: June 1934
Creator: Selden, R. F.
System: The UNT Digital Library
Underfeed Combustion, Effect of Preheat, and Distribution of Ash in Fuel Beds (open access)

Underfeed Combustion, Effect of Preheat, and Distribution of Ash in Fuel Beds

From Introduction: "This report covers studies of the underfeed-type fuel bed-exemplified by underfeed stokers-and of the effect of preheated air on what transpires in both overfeed and underfeed fuel beds."
Date: 1934
Creator: Nicholls, P.
System: The UNT Digital Library