Volume 72, Issue 1862supp
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Features
The Great Star Map—II
Star Counting
Variation in the Purchasinǵ Power of Gold
The Extension of Wireless Teleǵraphy
London's Electric Trains
Railway Engineering in the British Metropolis
The Motor Fire Enǵine
The Automobile to the Rescue
Extensive Seaport Improvements at Havre
Startinǵ a Gas Enǵine with Steam
Practical Aspects of Printing Teleǵraphy—VII
An Inventor on the Difficulties to be Encountered and the Way to Overcome Them
The Sun's Distance Determined from Eros
Freiǵht Handled Mechanically
Electrical Motor Driven Portable Conveyer which Handles PacKages, Cases and Lighter Cargo
Superheater Usinǵ Waste Heat
A Contribution to Factory Economy
The Bioloǵy of the Savant
A Study in the Psychology of Personality
The Sick Pearl Necklace of Madame thiers
Headless Butterflies
Manufacture of Cocaine
The Chemical Preparation of an Important Drug
The Sportinǵ Airship “Parseval V.”
A Three-passenger Craft
A New Construction in Worm Gearinǵ
The Endless Screw as a Reducing Gear
Recent Researches in the Field of Radio-activity
A Review of the Present State of Our Knowledge