durable design for field use

disconnect the machine and verify that the battery leads are connected with the correct polarity

Using Theory and Basic Skills to Improve Your Accuracy

this heavy-duty digging knife helps cut clean plugs

and more efficiently whether you’re working material from a sluice box

Rocks From Space - Meteorite Book GP Coils durable design for field useThis popular nontechnical introduction to the fascinating world of meteorites, asteroids, comets, and impact craters is now even better! With more than 50 new photographs and updated illustrations, new and expanded appendixes, and some fun cosmic humor, Rocks from Space, Second Edition, journeys into the last frontier for close up looks at the latest astronomical discoveries. Relive the thrill of seeing Comet Hale Bopp as it streaked through the dark