Report of the Commissioner of Patents, to the Senate of the United States: On the Subject of Steam Boiler Explosions ... December 30, 1848

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Էջ 33 - An act to provide for the better security of the lives of passengers on board of vessels propelled in whole or in part by steam...
Էջ 9 - One of the points of enquiry to which their attention was specially directed, was to ascertain the sort of bursting produced by a gradual increase of pressure ; and, after several decisive experiments, they came to the conclusion that all the circumstances attending the most violent explosions may occur without a sudden increase of pressure within a boiler.
Էջ 133 - ... per cent. of the mean strength when tried cold. For the purpose of ascertaining approximately the law of decrease in strength by temperature, an investigation was made similar to that adopted for copper, embracing, however, only twelve of the points contained in the preceding table.
Էջ 147 - ... and spared no pains to exalt her character. The newspapers noticed the quick trips of the Moselle, and passengers chose to embark in this boat in preference to others. Her captain was an enterprising young man, without much experience, bent upon gaining for his boat, at all hazards, the distinction of being the fastest upon the river, and not fully aware, perhaps, of the inevitable danger which attended his rash experiment.
Էջ 147 - April, 1838, between four and five o'clock in. the afternoon, this shocking catastrophe occurred. The boat was crowded with passengers ; and as is usually the case on our western rivers, in regard to vessels passing westwardly, the largest proportion were emigrants. They were mostly deck passengers, many of whom were poor Germans, ignorant of any language but their own, and the larger portion consisted of families, comprising persons of all ages. Although not a large boat, there were eighty-five...
Էջ 149 - A touching display of maternal affection was evinced by a lady, who, on being brought to the shore, clasped her hands and exclaimed,
Էջ 118 - ... temperatures, a part of that tenacity would be overcome by heat, and the rest must be destroyed by the mechanical force, it is evidently a question of experiment, to decide what relation the two forces have to each other at the several temperatures between the two extremes to which we have just alluded. To decide the theoretical question, or, in other words, to deduce, from the experiments, a law which might be expressed in an abstract form corresponding to all the possible phenomena, would require...
Էջ 7 - ... elasticity of steam by heat. That a gradual increase of pressure can produce all the effects of the most violent explosions, has been conclusively proved by the experiments of the committee of the Franklin Institute...
Էջ 28 - ... for any such interference with the minor regulation of the engine. The penalties provided in the twelfth section of the law are regarded as too harsh, and it is found that, on that account, they cannot be enforced. Juries cannot be induced to subject a man to the penalties of manslaughter for an act of negligence to which they find it impossible to attach the degree of guilt which so severe a sentence would seem to imply.
Էջ 133 - It will be found that with the exception of a slight anomaly between 520° and 570°, amounting to — .08, the numbers expressing the ratio between the elevations of temperature, and the diminutions of tenacity, constantly increase until we reach 932°, at which it is 2.97, 'and that from this point the ratio of diminution decreases to the limits of our range of trials, 1317°, where it is 2.14. It will also be observed, that the diminution of tenacity at 932°, where the law changes from an increasing...

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