1G9 
the number of days of rainfall of each year. They are as fol- 
lows, column (h) representing the ratios of rain-fall, and (c) 
the ratios of the number of days on which rain fell. 
Year. 
(c.) 
1865 
-794 
-847 
1870 
-868 
'851 
1864... 
....... -882 
-861 
1873 
-889 
1-047 
1868 
-940 
-955 
1871... 
, -947 
'918 
1861 
-962 
*966 
Mean 
-897 
...... -920 
1-014 1-009 
1-020 1-004 
1-034 1-057 
1-076 1-076 
1.230 1-110 
1-383 1-263 
Mean 1-126 1-086 
From the above table it will be seen that the ratios of the 
first Means are inverse to those of the second Means ; and 
that when the rainfall was below the average there was a 
relative increase of the number of wet days ; but when it 
was above the average there was a relative decrease in the 
number of wet days. So that in wet years, as a rule, more 
rain falls at a time than in dry years ; and we have more 
rainy days in proportion to the fall in dry years than we 
have in wet ones. 
“ The Cause of Solar Heat,” by David Winstanley, Esq. 
When a body possessing the visible energy of mechanical 
translation is arrested in its course, that energy, according 
to the laws of conservation, is not destroyed, but becomes 
apparent in another form, generally in the form of heat. 
Should a body receive two equal impulses in diametrically 
opposite directions at the same time, mechanical translation 
as a result thereof is impossible, and the energy thus ex- 
pended, it appears to be agreed, will in the main assume the 
form of heat. Should a body however receive two equal 
impulses in directions inclined to each other mechanical 
translation will ensue, but the value of the energy of visible 
1867. 
1869. 
1863. 
1862, 
1866, 
1872. 
