Technology and industrial efficiency: a series of papers presented at the Congress of Technology, opened in Boston, Mass., April 10, 1911, in celebration of the fiftieth anniversary of the granting of a charter to the Massachusetts Institute of Technology

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McGraw-Hill book company, 1911 - Industrial efficiency - 486 pages
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Page 93 - By a Portland cement is meant the product obtained from the heating or calcining up to incipient fusion of intimate mixtures, either natural or artificial, of argillaceous with calcareous substances, the calcined product to contain at least 1.7 times as much of lime, by weight, as of the materials which give the lime its hydraulic properties, and to be finely pulverized after said calcination, and thereafter additions or substitutions for the purpose only of regulating certain properties of technical...
Page 446 - In the majority of factories visited the ventilation was found to be poor, and in many of them distinctly bad. Of the rooms not especially dusty, 102 were badly ventilated and 26 were overcrowded. In the rooms in which large amounts of...
Page 161 - ... benefit to the community socially, as an intermediary class between the employer or engineer on the one hand, and the workmen on the other. To attempt, however, to train young men separately for the position of foremen would be under the existing organization of labor an impossibility.
Page 6 - Hadst thou not Greek enough to understand thus much: The end of Man is an Action, and not a Thought, though it were the noblest?
Page 394 - The condition of perfect public health requires such laws and regulations, as will secure to man associated in society, the same sanitary enjoyments that he would have as an isolated individual; and as will protect him from injury from any influences connected with his locality, his dwelling-house, his occupation, or those of his associates or neighbors, or from any other social causes. It is under the control of public authority, and public administration; and life and health may be saved or lost,...
Page 389 - Sanitarians do not admit that even a grossly improper method of garbage disposal can have much to do with the spread of disease in a sewered city or that diphtheria or typhoid fever, or any other disease, is properly attributable to the entrance of sewer air into dwelling houses. So firmly embedded in public belief, however, is the connection of piles of decaying garbage with outbreaks of infectious disease and of defective plumbing...
Page 433 - ... mature at approximately the same date. • Seed and Seeding. — There is no crop in which more seed is wasted than the grasses. Of the seed sown a relatively small percentage develops plants, and probably there is no crop in which failure to secure a satisfactory stand of plants is more common. This is due to a number of factors, among which may be mentioned the poor preparation of the seed-bed, the faulty covering of the seed and the adverse conditions that frequently follow seeding, thus causing...
Page 5 - We believe, on the contrary, that the most truly practical education, even in an industrial point of view, is one founded on a thorough knowledge of scientific laws and principles, and which unites with habits of close observation and exact reasoning a large general cultivation.
Page 86 - ... watts per candle power as against 3.1 of the earlier lamps and of charging power at 10 cents per kilowatt hour, we get as a result a saving of $240,000,000 per year, or two-thirds million per day, Naturally, this is a saving which is to be distributed among producers, consumers, and others, but illustrates very well the possibilities.
Page 473 - ... perfection in the adaptation of means to ends, than is required to meet the merely economic standard. So far as the demands of beauty can be distinguished from those of economy, the kind of beauty most to be sought in the planning of cities is that which results from seizing instinctively, with a keen and sensitive appreciation, the limitless opportunities which present themselves in the course of the most rigorously practical solution of any problem, for a choice between decisions of substantially...

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