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proctor compaction test

nbsp018332the proctor compaction test is a laboratory method of experimentally determining the optimal moisture content at which a given soil type will become most dense and achieve its maximum dry densitythe test is named in honor of ralph roscoe proctor who in 1933 showed that the dry density of a soil for a given compactive effort depends on the amount of water the soil contains during soil...

stars and planetary systems in fiction

nbsp018332the notion that there might be inhabited extrasolar planets can be traced at least as far back as giordano bruno who in his de linfinito universo e mondi on the infinite universe and worlds 1584 declared that quotthere are then innumerable suns and an infinite number of earths revolve around those suns these worlds are inhabited if not exactly as our own and if not more nobly at...

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