Experiments on Safety of Incombustible Plugs for Stemming Explosives
The Light Has Been Broken: 560+ Macabre Classics, Supernatural Mysteries & Dark Tales
The Horror Beyond Life's Edge: 560+ Macabre Classics, Supernatural Mysteries & Dark Tales
Protostars and Planets III
The Light Has Been Broken: 560+ Macabre Classics, Supernatural Mysteries & Dark Tales
The Horror Beyond Life's Edge: 560+ Macabre Classics, Supernatural Mysteries & Dark Tales
SOMETHING WICKED: 560+ Horror Classics, Macabre Tales & Supernatural Mysteries
The Power of Darkness: 560+ Supernatural Thrillers, Macabre Tales & Eerie Mysteries
The Expolsibility of Titanium, Zirconium, Thorium, Uranium and Their Hydrides
Coal Mining in Europe, a Study of Practices in Different Coal Formations and Under Various Economic and Regulatory Conditions Compared with Those in the United States, by George S. Rice and Irving Hartmann. [Preface by John W. Finch.].
Characteristics of Fuel Pitches and Their Explosibility in Pulverized Form, by Irving Hartmann, H. C. Howarth and H. P. Greenwald...
Tests on the Ignition of Natural Gas-air Mixtures by Permissible Explosives in the Experimental Coal Mines, by H. P. Greenwald, H. C. Howarth, John Nagy and Irving Hartmann
Experiments on Strength of Small Pillars of Coal in the Pittsburgh Bed, by H. P. Greenwald, H. C. Howarth and Irving Hartmann