The SciencesAugust 1, 1923
Making Old Air Better than New, Chemical Analysis with the Spectroscope
Stories by A. Gradenwitz
Mind & BrainApril 1, 1923
Current Psychic Investigation in Europe
Statements from Well-Known Psychic Workers, Baron von Schrenck Notzing and Mme. Bisson
The SciencesMarch 1, 1923
How Iron Rust Grows, Problems Relating to Saggars and more
The SciencesJune 4, 1921
Weighing the Ten-Millionth of a Milligram
The SciencesOctober 12, 1912
A Projection Lantern Without Objective
The SciencesJuly 11, 1908
A Novel Cooling Installation
A Suggestion for the Tropics
TechnologySeptember 12, 1903
A Novel Measuring Machine
TechnologyJune 27, 1903
The Telephot, a Novel Apparatus for Photographing at Great Distances