The SciencesAugust 26, 1916
Perpetual Motion
The One Phenomenon Which Is Universal and Constant
Stories by Charles E. Benham
The SciencesNovember 28, 1914
Stereoscopic Drawing
A Training for Accurate Workmanship
The SciencesMarch 15, 1913
How to make an Electroscope
A Comparatively Easy Task When You Know the Way
The SciencesSeptember 17, 1910
Atmospheric Electricity
A Review of Recent Researches
The SciencesOctober 2, 1909
A Perpetual Clock
The Ingenuity of James Cox
The SciencesAugust 21, 1909
Calendar for 200 Years
From the Introduction of New Style
The SciencesFebruary 16, 1907
A Perpetual Calendar
The SciencesAugust 31, 1895
The Sympalmograph