Mathematical instruments Volume 3; Their construction, adjustment, testing, and use - Brossura

Heather, John Fry

Brossura

ISBN 10: 1231125624 ISBN 13: 9781231125625

Casa editrice: RareBooksClub.com, 2012

Riassunto

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. 1891 Excerpt: ... 1300 28-62 1400 28-51 1500 28-41 1600 ' 28-31 1700 28-20 1800 2810 1900 2800 2000 2790 2100 27-79 2200 2769 2300 27-59 2400 2749 2500 2739 2600 27-29 2700 27-19 2800 2709 2900 2700 3000 2690 3100 26-80 3200 26-70 3300 26-60 3400... 26-51 3500 26-41 3600 26-31 3700 26-22 3800 26-12 3900 26-03 4000 26-93 In the table thus modified, if the distance between the two readings of the barometer be taken off with compasses, or measured on a slip of paper, it will extend on the column of heights from zero to the difference of altitude, at the assumed temperature of 55. If the column of altitudes be arranged on a slide, adapted to a groove, in a rule having the column of barometric readings marked upon it, then by merely setting the zero of the slide to the barometric reading of any station at starting, the altitudes of all points passed over, at the assumed temperature of 55, will at once be read on the slide, opposite the observed height of the barometer at those points. A sliderule of this kind is manufactured by Mr. West, of Charing Cross, from the design of its inventor, Mr. Whitley, of Penarth, Trui'o. Mr. Whitley makes a length of one inch on the slide correspond to 200 feet of altitude, and, dividing the inch into 20 equal parts, each division indicates 10 feet difference of altitude: the corresponding barometric heights on the fixed scale then differ, on the average, by about-01', so that the difference of altitude corresponding to each variation of TJ of an inch of the barometer, is at once read on the slide. A slide-rule thus constructed, 25 inches long, would extend from 31-11 inches of the barometer, corresponding to a depression of 1,000 feet, to 25'93 inches, corresponding to an altitude of 4,000. Nothing can be more simple, than to set out with such a...

Su questa edizione

• Editore: RareBooksClub.com
• Data di pubblicazione: 2012
• ISBN 10: 1231125624
• ISBN 13: 9781231125625
• Rilegatura: Copertina flessibile
• Numero di pagine: 72