Volume 25, Issue 629supp
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Features
Sanitary Trains
Etiology of Scarlet Fever
Improved Hay Press
Writing Apparatus for Engraving Small Figures
Asbestos Theater Curtain
The Development of the Mercurial Air Pump
Eli Terry and the First Wooden Clocks
Wool Hat Making
Photo. Wrinkles
MOUNTING BOARD
Polishing Metals and Polishing Agents
A New Platinotype Process
The Galioscope
Telescopes: their History and the Discoveries made with Them
Universal Optical Apparatus
Hughes' Induction Balance
Electrical Telephone Boxes
Snow Hall of Natural History, at Lawrence, Kan
Preparation of Nitrogen and Analysis of Air by Nitric Oxide
Chemical and Allied Industries
Group VII.—Dyes and Coloring Matters from other Sources than Coal Tar
Orsat's Apparatus
Estimation of Metallic Iron in Slag
A Thermostat
Distilling and Maturing Alcohols
Building Plans and Specifications
The Primitive Seat of the Aryans
The Great Alpine Rockfoil
(saxifraga pyramidalis)