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'The Transactions of the Bombay Geographical Society. From January 1863 to December 1864. (Edited by the Secretary.) Volume XVII.' [230] (403/524)
The record is made up of 1 volume (451 pages). It was created in 1863-1864. It was written in English. The original is part of the British Library: India Office The department of the British Government to which the Government of India reported between 1858 and 1947. The successor to the Court of Directors. Records and Private Papers Documents collected in a private capacity. .
Transcription
This transcription is created automatically. It may contain errors.
f230 ON A METHOD OF CALCULATING ALTITUDES
Multiply the difference by 53775 and divide by the sum of the
readings, and to the result add the correction B taken from Table
II or computed by formula (7).
To the sum of the temperatures of the air, in Fahrenheit’s scale, add
914, and multiply the result last obtained by this sum, dividing the
product by 1000 —or, striking off three figures as decimals. This gives
the height very nearly.
Opposite the latitude X in Table III is the correction per cent, to
be applied ; and in Table IL is given the correction for variation of
gravity with the altitude?
Example.
MM. Bravais and Martins on the 29th August 1814 made the fob
lowing observations for the height of Mount Blanc :—The height of the
Barometer one metre below the summit was 424-05 ram - the attached
thermometer—4°-2 C. =24 0, 44 F. and the temperature of the air — 7°6
C. = 18 0, 32 F ; the barometer of the Observatory of Geneva (407 m
= 1335 ft. above the sea level) read 729’65 mm *, the attached thermometer
1§ 0 (3 65 0, 48 F. and the temperature of the air 19°3 C 9 = 66°74F-
B
Here t—t'= 65°-48-
729 - 65mm.
_24 o - 44-=41°-04.
Constant
914
41 of I? ..
—3*00
t
66-74
18-32
999*06
10000
B corrected..
726-65
t'
424-05
Sum.
B — B'
C
53775
B 4 " B f ......
1 >715070.
X B —B'
6203
Product.
Dividing 16272*3 by J5-f JT=lU1507, the quotient is
By Table II, D for 14000 ....
Prop, part for 148
99906
1000
1000—0-94
Mbob™ 5
and p. p. for *94
Sum
.\ h' — h
14481-8 X - 99 ' Q6
1000
161325
1075
323
16272*3
14147-7
323-3
10-8
14481-8 ft.
—13*5
Tiios 7 ^ ft?
About this item
- Content
The Transactions of the Bombay Geographical Society. From January 1863 to December 1864. (Edited by the Secretary.) Volume XVII.
Publication details: Bombay: Printed at the Education Society's Press, Byculla, 1865.
With maps, etc.
- Extent and format
- 1 volume (451 pages)
- Arrangement
This volume contains a table of contents giving headings and page references, and two indexes. There is an index to Volumes I-XVII (1836-1864) in a separate volume (ST 393, index).
- Physical characteristics
Dimensions: 220 x 140mm
- Written in
- English in Latin script View the complete information for this record
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Copyright: How to use this content
- Reference
- ST 393, vol 17
- Title
- 'The Transactions of the Bombay Geographical Society. From January 1863 to December 1864. (Edited by the Secretary.) Volume XVII.'
- Pages
- front, back, spine, edge, head, tail, front-i, i-r:ii-v, 1, 1a:1b, 2:16, 1:132, 1:18, 18a:18b, 19:206, 206a:206b, 207:256, 256a:256b, 257:340, iii-r:iv-v, back-i
- Author
- Bombay Geographical Society
- Usage terms
- Public Domain