okumak Build Your Own Laser, Phaser, Ion Ray Gun & Other Working Space-Age Projects internet üzerinden

Excerpt from a book description on the back cover: "Build a hand-held, battery-operated, visible laser light source capable of illuminating low level clouds . . . use it for special effects, light shows, long range sighting holography and other exciting space age experiments! "Put together your own magnetic field distortion detector that lets you listen to, measure, and record solar activity, aircraft, UFOs and other objects by sensing the slightest change in the Earth's magnetic force field!" The author gives detailed building instructions and illustrations.