SUPPLEMENTARY REPORT ON METEOROLOGY. 91 
152. Mr. Caldecott, astronomer to the Rajah of Travancore, 
has obligingly communicated to me the results of his observa- 
tions in 80° 30! N. lat., where he finds the oscillation from 10 a.m. 
to 4 p.m. to be ‘109 English inches = 2°77 millimetres, whilst 
my formula gives 2°57. There appears to be some anomaly at 
the Cape of Good Hope, if the reductions with which Sir John 
Herschel has furnished me represent correctly the series of 
observations made at the Royal Observatory there. From 
58 months’ observations (lat. 33° 56’ S.), the oscillation is 
“025 mm. = 0°64 mm. The formula would give 1:42 mm., or 
more than twice as much; a difference altogether improbable, 
or else indicating some remarkable local anomaly. 
153. Colonel Sykes* finds the maximum atmospheric tide in 
the East Indies (mean lat. 183°, mean elevation 1800 feet), to 
be between 9-10 a.m. and 4-5 p.M., and to amount to ‘107 inch 
=2-72mm. by four years’ observations. The formula gives 
228mm. Colonel Sykes finds the hours to be unmodified by 
elevation, and to be the same as in Europe and America. He 
has also shown such enormous irregularities in the results from 
different parts of India, and even in the same place at different 
times, as do not so much militate against any particular for- 
mula, as they show the impossibility of any one formula 
embracing such discordant conclusionst. Colonel Sykes has 
shown that the supposed interruption of the atmospheric tide 
during the prevalence of the monsoon has no existencef. 
_ 154. Prof. Kamtz§ has made some interesting observations 
on the variation of the atmospheric tide with height|| in Switzer- 
land, on the summits of the Faulhorn and Rigi, compared with 
Zurich and Geneva. The hours are nearly the same in all 
Cases, 4 a.m., 10 a.M., 3 P.M., 9 P.M. 
rd French Lines. 
The mean oscillation at Zurich and Geneva . 0°398 
Panthorn o.oo OYE 
ri Dy) 
~ * Philosophical Transactions, 1835. t Ibid., p. 176. 
__{ An account has been published (Proceedings of the Royal Society, May 
2ist, 1840), since this report was written, of valuable Observations on the 
Pperometer, by Capt. Thomas, at Alten, in Finn-marken, in lat. 70°; from 
which it clearly appears that the barometric oscillation is there negative, as my 
formula would indicate that it ought to be. I am bound to apply to the 
“Report” on Capt. Thomas’s Observations published as above, the remark 
which I have made upon Colonel Sykes’s paper, in the text, viz. that it is 
' searcely philosophical to expect that any formula should coincide more nearly 
With observations, than one year’s observations do with another. 
__§ Poggendorff, xxvii. 345. See also Gautier on the Annual and Diurnal 
Variations of the Atmospheric Tide. Bibi. Univ., N. S., xxiv. 124, 
| See former Report, p. 232, and my paper in Edinburgh Transactions, 
vol. xii. 
