The low cost of mining was the principal consideration, since, with mercury’s price per pound, the total gross value of the ore did not exceed too much per ton. Square setting and filling was out of the question, so various attempts with cheap methods were made, among them a shrinkage system. None gave satisfaction on account … Read more
Quicksilver deposits are of special interest because they are confined to shallow depths and their origin is comparatively clear. The absence or scarcity of cinnabar and the less common quicksilver minerals in deposits whose features point to deposition at high temperature implies that these minerals are not stable at such temperatures, and the fact that … Read more
Any amalgamation test is found to possess most merits and fewest limitations when reduced to the smallest possible dimensions permitting uniform action and certain treatment. A limit is always reached at some point in this reduction in size, where some condition no longer can be fulfilled. In many continuous mechanical tests the limit is set … Read more