SA Supplements Vol 85 Issue 2205supp

SA Supplements

Volume 85, Issue 2205supp

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Features

An Important Biological Problem

The Significance of Essences and Pigments

Jean Dufrenoy

Syrian Remains Discovered in Rome

The Sanctuary of Gionas on the Janiculum

Nicola Pascazio

Detection of Fore'gn Oils in Castor Oil used for Lubricating Aeroplane Motors

An Interesting Double Star

To Keep the Airmen Warm

The Mosquito Question

Migration as a Factor in Control

Thomas J. Headlee

The Cruisers of the Rails

Height at Which Sounds can be Heard

Best Deglet Nur Grown in America

Oil Recovery Methods

Mediaeval Choir Stalls—I

Design and Decoration of Misericord Seats

Photographic Determination of Auroral Heights

The Sikhs—II

A Sect that Became a Nation

Sirdar Daljit Singh

Optical Properties of Light-Filters

The Most Practical Accelerator of Vulcanization

Government Department of Inventions in France

Solar Hydrogen Bombs

The Mont d'Or Tunnel

A Simple Line-Dividing Instrument

A. Bursill

Notes on a High Temperature Thermostat

J. L. Haughton, D. Hanson

Electric Power in Relieving Coal Shortage

Developments in Alternating-Current Work—I

The Technical Story of the Frequencies

B. G. Lamme

Birds used in Falconry

Attraction between Two and Three Bodies

G. Boucheny

Magnetization and Rontgen-Ray Examination