Features
The Reproduction of Diffraction Gratings
A Novel Indicator
The Chevalet Heater-Detartarizer
Genard's Safety Valve
Transferring Films While Wet
Collodion
Selected Formulæ
A Terrific Ballooning Experience
Wholesale Development
Electrical Notes
Engineering Notes
Miscellaneous Notes
The Bicycle in the Army
Renaissance Clocks according to Works of Art
Alternate Current Transformers
Lecture II. The Construction of the Transformer
Scientific Education in Germany and England
Some Common Diseases Observed North of the Arctic Circle
Jointing of Sewer and Drain Pipes
The Influence of Light upon the Periodical Depth Migrations of Pelagic Animals
Botanical Gardens
Origin and Development
