SA Supplements Vol 41 Issue 1064supp

SA Supplements

Volume 41, Issue 1064supp

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Features

The Ancient Cities of Yucatan

Automatic Firing Guns

I.—Historical

Hiram Stevens Maxim

Wood Paving Block Machinery

Circulation in Water Tube Boilers

W. H. Watkinson

Garwood's Line throwing Gun

Some Horseless Carriages

New Fresh Water Distilling Apparatus

Engineering Notes

Miscellaneous Notes

Electrical Notes

A Camera Swingback Indicator and how to make It

F. C. Lambert

Selected Formulæ

Acetylene for Domestic Lighting

Tests of the Baltimore Electric Locomotive

Present and Prospective Development of Electric Tramways

The Rational use of Cocaine in Surgery

Claude A. Dundore

A Short Cipher Code for Commercial Uses

Edward S. Holden

Optical Effects of Parallel Lines

Patents!