An Enquiry Into and an Explanation of Decimal Coinage and the Metric System of Weights and Measures
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...to use decimally divided leading screws for lathes, so that even in countries using metric systems most of the screws used have threads of Whitworth pitches based on the binary scale, and whenever metric leading screws are used these also are to some extent on the binary scale, that is to say, they use 4-millimetre, 6-millimetre, and 8-millimetre pitch and so on; but even then they are more inconvenient than Whitworth leading screws based on the inch divided on the binary scale. Of course this defect has nothing to do with the metric system, but shows the inferiority for this purpose of the decimal to the duodecimal system of division. The result of this is that in countries using the metre we find two sets of measurements on one drawing, the metric for most of the details, but Whitworth pitches and dimensions specified for the screws. The Whitworth scale of pitches at so many threads to the inch is simple and easily remembered, but on the metric system, in order to avoid confusion and mistakes, the names of the pitches must be given in tenths of millimetres, so that we find the change wheel tables for their lathes naming the pitches in tenths of millimetres, such as seventy-seven tenths, and so on. Meet1ng Of The Royal Stat1st1cal Soc1ety, December 31ST, 1903: Mr. George Moored explained that he was a great believer in the metric system, but he would like to see a metric system based on a different unit to the metre. He thought that the Decimal Association was working on the wrong lines when they sought to get the system in use in France adopted in this country. In his opinion they missed the great essential. The base measurement was not necessarily a metre. If it had not been for such an outlandish length as the metre being adopted when the...
- Paperback | 44 pages
- 189 x 246 x 2mm | 95g
- 03 Jul 2012
- Miami Fl, United States
- Illustrations, black and white