Feature

Front Matter

Tranquilizers and Alcohol Do Not Mix

[Photograph]: Satellite Spotter

New Machines and Gadgets

The Changing Face of Wood

Plasma Engine Developed

1,903 Water Supplies Naturally Fluoridated

Index Addendum

Books of the Week

Big “Eye” to Watch Stars Late This Summer

Large Telescope Planned for Satellite

[Photograph]: Thermoelectric Generator