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" The first test of inexperienced, though intelligent and careful persons, are usually very contradictory and inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers.... "
Proceedings of the American Gas Light Association ... - Página iii
por American Gas Light Association - 1902
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Portland Cement: Its Manufacture and Use

Charles Davis Jameson - 1895 - 192 páginas
...inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...intelligence, that trustworthy tests can be made. The test for tensile strength on a sectional area of one square inch is recommended, because, all things...
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Portland Cement: Its Manufacture and Use

Charles Davis Jameson - 1898 - 192 páginas
...inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...such a marked influence upon the results, that it is onlv by the greatest care in every particular, aided by experience and intelligence, that trustworthy...
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Hydraulic Cement: Its Properties, Testing, and Use

Frederick Putnam Spalding - 1903 - 265 páginas
...sometimes thought to be. No small degree of experience is necessary before one can manipulate the materials so as to obtain even approximately accurate results....intelligence, that trustworthy tests can be made." Experience, since the report of the committee was made, has shown that the difficulties in the way...
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American Cements

Uriah Cummings - 1898 - 299 páginas
...inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...intelligence, that trustworthy tests can be made. The test for tensile strength on a sectional area of one square inch is recommended, because, all things...
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American Cements

Uriah Cummings - 1898 - 299 páginas
...inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...the results, that it is only by the greatest care in evefy particular, aided by experience and intelligence, that trustworthy tests can be made. The test...
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A Treatise on Masonry Construction

Ira Osborn Baker - 1899 - 556 páginas
...determination of the tensile strength of cement is a much less simple process than at first appears. Many things, apparently of minor importance, exert...upon the results that it is only by the greatest care that trustworthy tests can be made. The variations in the results of different experienced operators...
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The Chemical and Physical Examination of Portland Cement

Richard Kidder Meade - 1901 - 183 páginas
...7, 1895. no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...intelligence that trustworthy tests can be made." The personal equation probably plays its most important part in the gauging of the cement, the making...
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Lime and Cement Industries of New York, Tema 44

Heinrich Ries - 1901 - 968 páginas
...inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...of minor importance, exert such a marked influence on the results that it is only by the greatest care in every particular, aided by experience and intelligence,...
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Bulletin of the New York State Museum, Tema 44

1901 - 968 páginas
...inaccurate, and no amount of experience can eliminate the variations introduced by the personal equations of the most conscientious observers. Many things,...of minor importance, exert such a marked influence on the results that it is only by the greatest care in every particular, aided by experience and intelligence,...
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Practical Cement Testing

W. Purves Taylor - 1905 - 320 páginas
...sometimes thought to be. No small degree of experience is necessary before one can manipulate the materials so as to obtain even approximately accurate results....intelligence, that trustworthy tests can be made." Requisites for Good Testing. — The prime requisites for the accurate and efficient testing of cement...
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