SUPPLEMENTARY REPORT ON METEOROLOGY. 115 
of rain, though there is nothing on record comparable to the two 
preceding ones. Flaugergues, the eminent meteorologist of 
Viviers, obtained, on the 6th September, 1801, 13 inches 2°3 
lines (144 English inches) of rain in eighteen hours*. On the 
20th May, 1827, there fell at Geneva 6 inches of rain in three 
hourst. At Perth, on the 3rd August, 1829, there fell #ths of 
an inch of rain in half an hourf. On the 22nd November, 
1826, I observed, at Naples, a fall of j4ths of an inch of rain 
and hail in thirty-seven minutes §. 
228. Werethe equatorial records of the fall of rain as minute 
in respect of distribution as of total amount, we should doubt- 
less have records of enormous falls within twenty-four hours. 
None so recorded, that I am aware of, approach the results at 
Genoa and Joyeuse. From the total quantities measured, it is 
evident that the result, for particular days, must be enormous. 
Don Antonio Lago observed, at San Luis Maranham (22° S. 
lat.) a fall of twenty-three feet, 4 inches, 9°7 lines of rain in a 
year||. Roussin states§ (his account is confirmed), that at 
Cayenne (5° N. lat.) in February, 1820, there fell, in ten hours, 
10°25 inches of rain; and between the Ist and 24th February, 
twelve feet 7 inches. From observations in the Ghauts, it ap- 
pears that in the eastern hemisphere, in lat 18° N., 302-21 
inches of rain have been measured**, a quantity exceeding 
that stated on the authority of Roussin, and which was once 
considered almost incredible ; and of this quantity (25:2 English 
feet) nearly 10 feet fell in the month of July alone. 
229. I have formerly stated, that the fall of rain increases 
on mountains}; and the following statement of Schubler, as to 
the fall of rain at three stations, confirms the facttt : 
Height. Depth of Rain §§. 
Wapmeen 7": 1000 feet  . 8572 
Mchaicuhots 71576" 40° . oo... YB e56 
Alp Genkingen 2400 , .. . . 5513 
* Bibliothéque Universelle, viii. 132, quoted in Gehler. 
+ Ann. deChim.,xxxvi.414. Themean annualrain at Geneva is only 80 inches. 
{ Edinburgh Journal of Science, New Series, iii. 368. 
§ I donot know whether there exists a record of the fall of rain at Cler- 
mont, on occasion of the catastrophe of the Valley of Royat, a few years ago; 
the amount, I presume, must have been very great, judging by the effects. M. 
Quetelet has recorded a remarkable fall of rain in Belgium (Comptes Rendus, 
viii. 980.). || Humboldt, quoted by Muncke. 
{| Silliman’s Journal, iv. 375., quoted by Muncke. 
** Communicated by Colonel Sykes, at the Ninth Meeting of the British 
Association.— Atheneum, p. 658. Prof. Stevelly’s inference from these results 
must, 1 presume, be erroneously reported. 
tt Former Report, p, 251. tt In Gehler, vii. 1246. 
 §§ The unit of measure is not stated. 
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