CONTENTS 
A 
I 
SC/-^MZ£ 
OF 
No. XIX, 
Page 
Art. I. Remarks on the Influence of Magnetism on the Rates of 
Chronometers. By George Harvey, Esq. M. G. S. 
M. A. S., &c. &c. - - - - 1 
II. Description of the Whirlwind at Scarborough on the 
24th June 1823. By John Dunn, Esq. Fellow of 
the Royal College of Surgeons, London, - 11 
III. Observations on the Heights of the Himalaya Moun- 
tains, with the Measurements of Lieut. A. Gerard, 
and Mr J, Gerard. By William Lloyd, Captain 
of the Bengal Army, - - - 18 
Corrected Table of the Heights of the Snowy Peaks of the 
Himalaya Mountains, - - - 21 
IV. . Observations on Bees, and particularly on the conver- 
sion of the Larvae of Working-Bees into Queen-Bees. 
By the Reverend Mr Dunbar of Applegarth, 22 
V. On the Refractive and Dispersive Power of different 
Species of Glass, in reference to the improvement of 
Achromatic Telescopes, with an Account of the Lines 
or Streaks which cross the Spectrum. By Joseph 
Frauenhofer of Munich. Concluded from Vol. IX. 
p. 299- - - - - - ' 26 
VI. On Rock Formations. By Baron Alexander Hum- 
boldt, ----- 40 
VII. Description of a simple, cheap, and accurate Method of 
experimenting on small quantities of Gases, by means 
of Bent Tubes. By Mr William Kerr, - 53 
VIII. Account of the Earthquake which happened in Chili, 
on the 19th of November 1822, - - 56 
IX. /Account of two Maps of Zaenmaa or Yangoma. By 
Francis Hamilton, M.D. F.R.S. & F.A.S. Lond. 
& Edin. With a Plate, - - - 59 
