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the maximum finger registered the force of a storm to be, 
say 30 lbs. on the square foot, the pencilling on the paper 
would show, when applied to the scale, the exact point of 
the compass from which the blast came. 
“On the Mode of Registering the Force and Direction of 
the Wind,” by Thos. Mackereth, F.R.A.S., F.M.S. 
I have for a long time been wishful to obtain a simple 
instrument by which I could record, in a satisfactory 
manner, the exact force and direction of the wind. I am 
aware that records are made by Osier’s Anemometer, but 
I have many objections to them. The first is, that its mode 
of recording the exact degree of the compass whence each 
pressure of the wind has come is so cramped, that it is 
impossible to determine such a degree from the record. 
The second objection is, that it is impossible from its record 
to determine the mean direction of the wind for any given 
time. The third is, that its system of machinery appears so 
complicated as, in my opinion, to leave doubt whether its 
records are reliable. The immense pressures it is said to 
have recorded at Liverpool, for instance, are, in my esti- 
mation, very questionable. Then the great cost of the 
instrument, and its requiring an ordinary building to be 
adapted for its use, must preclude its employment by the 
many meteorological observers we have in the country. 
Up to the time of the great storms which occurred on 
February 22nd, and March 8th, last year, I had a pressure 
anemometer which was made and kindly given to me by 
my friend Wm. Oxley, Esq. That this instrument recorded 
the exact pressures of the wind, I have abundant testimony. 
The greatest pressures of the storms I have mentioned was 
321bs. on the square foot. That was the highest pressure 
the instrument was capable of recording, and I believe, 
from other pressures which I witnessed during the same 
storms, that if the instrument could have recorded a higher 
