496 Dr. s ted man on the Degrees and Quantities 
Thefe tljree degrees of wind, that is the fecond and 
third of the Edinburgh regiiler, and an intermediate de- 
gree, are very diftinguifhable even by the fenfes, and 
without the alii fiance of any inllrument, by thofe who 
are attentive and have been accuftomed to make obfer- 
vations of this nature. 
To afcertain proportions of this nature, a longer term 
of years would have been more fat is factory ; but, in cafe 
others Ihould afterwards purfue this kind of computa- 
tion, the proportions are digefted in two. tables at the end 
of this elfay, and may be confulted occafionally. 
In making up thefe tables, viz. one of the fecond de- 
gree and above, and the other of the third and upwards, 
hurricanes are included, though that degree of wind be 
too high for any machine. But, as the obfervations were 
taken twice in twenty-four hours, and as winds fufficient 
to move thefe machines may be fuppofed to have hap- 
pened fometimes between the times of obfervation, 
though at thefe times the wind might have been below 
the mean; to compenfate this defect, hurricanes are in- 
cluded in the computation. 
From thefe tables then we have the following propor- 
tions of the two degrees of winds and upwards, to thofe 
below; and likewife of the mean betwixt thofe two 
degrees. 
Winds 
