My Web Site Page 180Poki Mogarli chose the topics covered by My Web Site Page 180 without reflecting upon the choices others have made. Launching into a full discussion of all the objectives while riding a bicycle backwards down a steep hillside is another way to look at things in a different light. |
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We saw large families of _ciancias_--beautiful birds with velvety black bodies speckled with white, and fan tails of rich brown colour, feathers of the same colour being also on the outer half of the wings. They possessed slender, most elegant necks, small brown-crested heads, and light yellow chests. Seen at a distance they were not, in shape, unlike pheasants. Twenty or thirty together at a time could be seen playing among the lower branches of the trees along the edge of the river. Then there were small birds of a beautiful metallic blue-black, with very long tails; these latter were innumerable near the water. |
Properly, however, this work should be done by the assayer, if only for the following reason. It is assumed that the dry ore of the sampler and of the assayer are the same thing; according to the nature of the ore, this may or may not be the case. The assayer, however, uses the sample which he has dried for his moisture-determination, as the dry ore on which he makes his other assays, and no variation in moisture would influence the other and more important determinations. Some ores are sent to the smelter with from 5 to 15 per cent. of adherent water. In these cases it is best to spread out the sample, and taking equal portions fairly at regular intervals, weigh into a Berlin dish 20 grams. This should then be dried over a sand-bath, or if the ore is likely to be injured by excess of heat, over a water-bath until the weight is constant. The loss of weight multiplied by 5 gives the percentage of water present. |
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