Recent Evidence for the Existence of the Nucleus Atom
Varied Theories Developed, but Much is to be Done to Furnish Definite Ideas
Features
Behavior of Incandescent Lamps
Watching the Earth Revolve
An Apparatus that Enables the Movements of the Earth to be Directly Studied
Petroleum Conditions in Russia
The Koepsel Permeameter
The Economies of Home Lighting
Facts and Figures on Various Systems, Past and Present
Science and the Tariff
Delicate Apparatus Employed in Determining Customs Duties
An Airship in the Field
A Personal Narrative from a German Observer
Damascus Blades
The Reaction of the Planets upon the Sun—II
Influence of the Earth and a Study of Sun Spots
Fuel Oil on Railroads
Photographing Projectiles—I
Securing Records by Means of Illumination from Electric Sparks
A Quality of Electrolytic Iron
Making Steel by Electricity
Various Systems; Their Merits and Defects
