Meteorological Observations. 65 
if the change be such as here assumed, that is, iain % in 
arithmetical progression, the mean thus hus deduced must be true 
with mathematical precision ; but it is not pretended that it 
will be perfectly so; in indeed we Know that the ratio is gene- 
picts less, in so much of that part of the series which extends 
from the extreme of the afternoon to the extreme of the next 
morning, as is occupied by the night. _It will therefore be 
proper to'divide this series into two, by an intermediate obser- 
vation, which is directed to be made an hotir after sunset; 
whether this be the most eligible time may be considered as 
left for examination. We shall then have three series divi 
from each other, by the atom afternoon and evening obser- 
vations; to find the mean of which, add the e morning observa- 
o, twice the afternoon seers, and twice the evening 
vation, to the next morning observation, and divide t 
sum by 6. This it is believed will give an approximation to 
the truth, as near as can be obtamed h observatio: 
and a mean sufficiently correct for every contemplated pur 
Se. , 
ore a medium by which to bring before the public, the re- 
sult of these extensive observations, Mr. Horatio Gates ee 
ford proposes to publish a State Meteorological Journal, 
pared rie: monthly reports from every county. 
will evidently be a very useful undertaking, and we cannot 
doubt that Mr. Spafford will execute it with care and ac- 
uracy. 
It would be happy if berometrical observations could be 
added to those | rain gauge, 
and perhaps the regents may enesshe find it convenient to 
furnish the different institutions with this important instru- 
ment. — : expense, ead aware, W would be conside rable, 
butt wetrust that this will not be regarded, in a great, opule 
and fa d state like New-York. An effort is ji ere 
makingt © induce good observers in other states and countries, 
to register their observations, upon a plan similar to that pro- 
paced Vice Chancellor Dewitt, and for that purpose his 
circular is transmitted to many individuals, from whom it is to 
eee net aid SY, Ee DA 
ed, ‘hr Professor 
Society a 
relative te 
John Osage to the and F 
New-York, in December, 1814—enttled ** Hints 
VOL, I.—NO. 1. 
