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Pàgina 472 - Engineer, being the art of directing the great sources of power in Nature for the use and convenience of man...
Pàgina 492 - ... a land of brooks of water, of fountains and depths that spring out of valleys and hills; a land of wheat, and barley, and vines, and...
Pàgina 492 - Oh that my words were now written ! oh that they were printed in a book! That they were graven with an iron pen and lead in the rock for ever!
Pàgina 327 - ... we may the better discern the direction in which we are to look for the solution of this problem, let us premise that all of these elements, in some of their combinations, are more or less soluble in water. There are, in fact, no such things in nature as absolutely insoluble bodies, but all, under certain conditions, are capable of being taken up by water, and again deposited from it. The alchemists sought in vain for a universal solvent, but we now know that water, aided in some cases by heat,...
Pàgina 331 - ... which, as decay went on, in great part replaced the woody tissue. Similar deposits of sulphides of copper and of iron often took place in basins where the organic matter was present in such a condition or in such quantity as to be entirely decomposed, and to leave no trace of its form, unlike the examples just mentioned. In this way have been formed fahlbands, and beds of pyrites and other ores. The fact that such deposits are associated with silver and with gold leads to the conclusion that...
Pàgina 382 - A Practical Treatise on the Examination of Milk and its Derivatives, Cream, Butter and Cheese.
Pàgina 473 - ... from the ineffaceable characters impressed on them we may learn that those aspirations after accuracy in measurement, truth in statement, and justice in action, which we reckon among our noblest attributes as men, are ours because they are essential constituents of the image of Him who in the beginning created, not only the heaven and the earth, but the materials of which heaven and earth consist.
Pàgina 478 - For comprehensiveness the book has not its equal." — Iron. " One of the best of the pocket books, and a useful companion in other branches of work than iron and steel.