'Transactions of the Bombay Geographical Society, from September 1850 to June 1852. Edited by the Secretary. Volume X.' [‎19] (40/458)

PROF. PATTON ON THE ANEROID. xix
scale, it is inconvenient to be obliged to convertthe degrees into those of the centigrade. As
some persons may prefer the use of his rule, I add it, with the example given above worked out,
Leslie’s Rule. —As the sum of the mercurial columns is to their difference, so is the constant
number 52000 feet to the approximate height. Correct the approximate elevation by shifting
the decimal point three places back to the left, and multiply by twice the sum of the degrees of
the detached centigrade thermometer ; this product being now added, will give the true height.
Taking the former example, we have—55'64 : 4-06 : 52000 : 3793, the approximate height and
the correction is 3*798 ft. * 99*7=378, which gives for the true height, 4l7l, differing from the
former by 27 feet.
Of the more minute daily variations, and the corrections, if any, that are to be appliedi
I hope to be able to have some account for the next meeting of the Society.
21st November, 1850. Joseph Patton.
The thanks of the Society were given to Mr. Patton for his communication.
The following Letters, Papers, Books, &c., received since last meeting, were laid before
the Society -
Letters —From C. Morehead, Esq., Superintendent of the Grant Medical College, No. 47,
dated 24th October last, transmitting for the use of the Society's Library, a Copy of the
Report of the College for the Session 1849-50.
From His Excellency Admiral De Tromelin, Commander of the French Navy in the
Indian Seas, dated 25th October last, expressing his thanks for the honor done him in
admitting him as an honorary member of the Society.
From Messrs Alexander Adie and Son, dated Edinburgh, 9th September last, enclosing an.
invoice and bill of lading A document confirming the goods which a ship has received. of Instruments shipped on board the ‘ Equestrian.’
From H. E. Goldsmid, Esq., Secretary to Government, Secret Department, No. 20, dated
the 23th ultimo, requesting that Government he furnished with a copy of the Society’s publication
for transmission to the Honorable the Court of Directors The London-based directors of the East India Company who dealt with the daily conduct of the Company's affairs. .
FromH. E. Goldsmid, Esq., Secretary to Government, Political Department, No. 4989, dated
31st October last, acknowledging the receipt of the Society’s letter, No. 92 of the 30th ultimo,
and of the Society's Transactions forwarded therewith, and requesting that the Society
will have the goodness to supply Government with two copies of its future Transactions for
transmission to the Hon’ble the Court of Directors The London-based directors of the East India Company who dealt with the daily conduct of the Company's affairs. and to the Board of Commissioners for the
affairs of India.
From R. T. Reid, Esq., Secretary to the Managing Committee of the Students* Literary
and Scientific Society, dated 2 nd instant, acknowledging the receipt of the Society’s letter of
the 30th ultimo, No 91, with a complete set of Transactions of the Society, and expressing
the best thanks of the Dnyanprasarak Library’s Committee for the Society’s very valuable
donation.
From Captain J. Willoughby, dated Poona, 2 nd instant, acknowledging the receipt of the
Society s letter of the 28th ultimo, and returning his best thanks for the honor done him in
electing him a member.
E. Roberts, Esq., dated Surat, 8 th instant, enclosing copy of observations taken at Surat
during the month of September last.
N. A, Dalzell, Esq., dated Vingorla, 28th ultimo, informing of his having transmitted
y per Pattimar three (3) cases containing Anemometers, &c., returned by Major
LeGrand Jacob, Political Superintendent.
From H. E, Goldsmid, Esq., Secretary to Government, Political Department, No. 5044, dated