278 Results of a Meteorelogical Journal. 
April and May, and of paraselene in September, was remarkable.. 
The number of solar and lunar halos is nearly equal ; the greatest 
portion appeared in April and December, two wet months, a 
proof of their being prognostics of approaching rain, as is almost 
every other meteoric phenomenon. ‘The frequent appearance 
of rainbows, both single and double, has enabled us to disprove 
Dr. Watt’s new theory of their formation, as published by him 
in the Annals of Philosophy, vol. xiii. p. 131. 
Mereors, both small and large, have also appeared frequently. 
Their connexion with, or appearance before, wind and rain, we 
have fully shown in the last volume of the Philosophical Magazine 
and Journal, from attentive and punctual observations. Besides 
these, we have observed other atmospheric phznomena, but 
not registered them, such as yellow lunar corone from 1° to 2° 
in diameter ; lunar discus halos, and lunar burrs, which though 
inferior to others, prognosticate approaching wet; for at the 
time of their appearance a partial condensation of the atmo- 
sphere at a considerable height, and to a great extent, is not 
only evidently going on by means of additional vapours brought 
up by a current or currents of wind, but also frequently corro- 
borated by the recession or sinking bf the mercurial column, and 
a slight mist or haze near the horizon. By such observations 
as these, any one may determine for his own convenience the 
approach of rain some hours before its actual contact with the 
ground, without troubling himself about ascertaining the elec- 
trical state of the respirable air at thetime. Should these pro- 
gnostics fail at any time, which is seldom the case, it is caysed by 
the combined influence of a superior wind, an increasing tem- 
perature, &c. that either dry up the descending vapours before 
their gravity is much augmented, or disperse them to some di- 
stant region. The appearance of the large solar and lunar halos 
determines the wet weather to be still nearer to us; and it is 
very rare that the vesicular vapours in which they are formed, 
are dispersed before their condensation and precipitation. 
The Evaporation is less this year than in any of the pre- 
ceding six years, on account of the frequent and heavy irriga- 
tions, and the low diurnal temperature of May, June, and July. 
Rain has fallen, more or less, on 208 days Ke year, of which 
98 whole days and nights is the real time it has rained. From 
the 26th of August to the end of the year, there were only 37 dry 
days; of these a great portion were completely overcast and 
windy; and on the other 90 days, 23 inches of rain fell, which 
exceed the quantity for the preceding eight months, This cer- 
tainly was the wettest period we have hitherto registered, and 
the distribution of the rain seems, from the various Meteorolo- 
gical Journals already published, to have been very unequal in 
different 
