Posted by donjr on March 20, 2018 at 11:09:38 from (71.121.230.44):
In Reply to: selective gravity posted by IanC on March 20, 2018 at 10:41:40:
Contrary to popular belief, rocks in a field are actually still growing. If you pick up a handfull of dirt, and examine it closely, you will find it is actually made of a huge number of small particles. These are actually stone seeds. Over many years, some of these begin to grow and become stones. Left alone for many years they become boulders. That's why there are more next year for picking and busting up machinery. And, when we fertilize, it makes them grow faster and bigger. So, for a higher stone yield, soil test and follow the recommendation for more rocks.....
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Today's Featured Article - Measuring with Calipers - by Staff. The legs of inside calipers are curved outward at the extremities to facilitate measuring small holes, while outside caliper legs have a large curve inward to increase their capacity for large work. Firm-joint calipers are adjusted approximately by the hands and then set to the feel of the work by tapping them on a metal surface. It is a common practice when opening calipers by this means to tap the top of the joint. It is better, if possible, to tap the inside of the legs, as repeated blo
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