## Our Weights and Measures: A Practical Treatise on the Standard Weights and Measures in Use in the British EmpireEyre and Spottiswoode, 1897 - 163 páginas |

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**Royal**Society , and Dr. Playfair , F.R.S .; and on the recom- mendations of commissioners appointed to ascertain the standards of the country , who reported in 1819 , 1820 , and 1821 . Exchequer In 1825 the Treasury Commissioners called ... Página 3

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**Royal**Society in 1742 , which was derived from the yard measure of Queen Elizabeth . The Troy Pound of 1758 was originally verified by Mr. Harris , the King's Assay Master , by comparison with the Exchequer Troy Weights of 1601. After ... Página 4

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**Royal**Observatory , in the**Royal**Mint , and with the**Royal**Society . Such copies are legally known as " Parliamentary Copies , " and in event of the original standards at the Standards Office being lost or injured , new standards can ... Página 5

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**Royal**Commission was appointed by Warrants , dated 9th May 1867 , and 4th May 1868 , to inquire into the condition of the Exchequer Standards , and to direct and superintend the steps necessary to be taken until all these official ... Página 8

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**Royal**Society of London , for 1826. The Imperial bushel , or 8 gallons , was verified in 1825 , and is made of gun metal ( Fig . 5 ) , but , like the other dry measures , the half - bushel and peck , its diameter is double its depth ...### Outras edições - Ver tudo

Our Weights and Measures: A Practical Treatise on the Standard Weights and ... H. J Chaney Pré-visualização indisponível - 2017 |

Our Weights and Measures: A Practical Treatise on the Standard Weights and ... Henry James Chaney Pré-visualização indisponível - 2008 |

### Palavras e frases frequentes

12 ounces acres ancient Apothecaries appears Assay avoirdupois pound AVOIRDUPOIS WEIGHT balance beam Board of Trade brass bushel carat chain coin contained copies corn Counter Machine cubic foot cubic inches decimal decimetre denominations deposited derived diameter distilled water drachm Edinburgh English Exchequer Fahrenheit feet firlot fluid ounces gauge gill gold grains grams hydrometer Imperial Standards Imperial system Imperial Weights inspection of weights inspectors Ireland Irish Jersey pound Jewel Tower kilogram litre London maund Measures Act measures of capacity meter metre metric system metric weights mile Millilitre millimetre mutchkin origin pennyweights pint Pyx Chapel quart reference regulated Report Roman Royal sale of coal scale Scotland seer square stamped standard weights Standard Yard Standards Office Statute Survey system of weights Trade standards troy pound troy weights United verified Vict weighing instruments weighing machines weights and measures Winchester wine gallon دو

### Passagens conhecidas

Página 76 - That the standard of electrical resistance should be denominated the ohm, and should have the value 1,000,000,000 in terms of the centimetre and second. (4) " That the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14-4521 grammes in mass, of a constant cross sectional area, and of a length of 106'3 centimetres, may be adopted as one ohm.

Página 77 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.

Página 76 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.

Página 77 - That an alternating current of one ampere shall mean a current such that the square root of the time average of the square of its strength at each instant in amperes is unity. 12. That instruments constructed on the principle of the balance, in which by the proper disposition of the conductors, forces of attraction and repulsion are produced, which depend upon the amount of current passing...

Página 76 - That it is desirable that new denominations of standards for the measurement of electricity should be made and approved by Her Majesty in Council as Board of Trade standards. 2. That the magnitudes of these standards should be determined on the electro-magnetic system of measurement with reference to the centimetre as unit of length, the gramme as unit of mass, and the second as unit of time, and that by the terms centimetre and gramme are meant the standards of those denominations deposited with...

Página 50 - Every person who uses or has in his possession for use for trade a weight or measure which is not of the denomination of some Board of Trade standard, shall be liable to a fine not exceeding five pounds, or in the case of a second offence ten pounds, and the weight or measure shall be liable to be forfeited.

Página 55 - trade description " means any description, statement, or other indication, direct or indirect, (a.) as to the number, quantity, measure, gauge, or weight of any goods, or...

Página 21 - Pendulum vibrating Seconds of Mean Time in the Latitude of London in a Vacuum at the Level of the Sea...

Página 77 - ... (14) That the electrical pressure at a temperature of 15 centigrade between the poles or electrodes of the voltaic cell known as Clark's cell, prepared in accordance with the specification attached to this report, may be taken as not differing from a pressure of 1*434 volts, by more than one part in 1000.

Página 77 - ... 15. That an alternating pressure of one volt shall mean a pressure such that the square root of the time average of the square of its value at each instant in volts is unity.