The SciencesJuly 18, 1908
The Duddell Thermo-Galvanometer
A Device for Measuring Extremely Small Currents
Stories by A. Frederick Collins
The SciencesNovember 2, 1907
A Convenient Pocket Transit
The SciencesSeptember 21, 1907
A Boy's Engines and How He Made Them
TechnologySeptember 21, 1907
The "Turn-Down" Electric Lamp
TechnologyAugust 3, 1907
An Improved Electric Welder
The SciencesJuly 27, 1907
The Fleming Direct-Reading Cymometer
Measuring Wireless Telegraph Waves
The SciencesJuly 20, 1907
How to Construct a Simple Wireless Telephone
An Application of Electro-Magnetic Induction
TechnologyMay 4, 1907
A Military Wireless Telegraph Equipment
The SciencesApril 27, 1907
How to Construct a Speaking Arc
The SciencesApril 20, 1907
How to Construct a Reversing Commutator for an Induction Coil
The SciencesApril 13, 1907
The Making of small Induction Coils with Bare Wire
TechnologyApril 6, 1907
The Gyroscope as a Compass
The SciencesApril 6, 1907
The Ondameter or Electric Wave Meter
The SciencesMarch 16, 1907
The Management and Operation of Ship and Shore Wireless Telegraph Stations.—VI
TechnologyMarch 16, 1907
Carborundum and Silicon Detectors for Wireless Telegraphy
The SciencesMarch 2, 1907
A Useful Combination Tool
TechnologyFebruary 23, 1907
Some New and Useful Electric Hand Tools
The SciencesFebruary 23, 1907
The Theory and Action of a 100-Mile Wireless Telegraph Set.—V
The SciencesFebruary 16, 1907
The making and the using of a Wireless Telegraph Tuning Device.—IV
The SciencesFebruary 9, 1907
The Installation and Adjustment of a 100-Mile Wireless Telegraph Set.—III
The SciencesFebruary 2, 1907
The Location and Erection of a 100-Mile Wireless Telegraph Station
TechnologyJanuary 19, 1907
A Handy Portable Crane and Hoist
The SciencesJanuary 5, 1907
An Easily-Made High-Frequency Apparatus
The SciencesDecember 15, 1906
How to Construct an Independent Interrupter