124. 
was kept ina room, without a fire in it, 
facing the north-east. 
At Kendal, the mean heat calculated 
from the mean heat of every month, in 
the years 1793, 1794, corresponds to 
47°,874. 
At Dumfries, the mean heat in 1793, 
of spring, corresponded to 44°,7489, of 
summer to 62°,2857, of autumn, to 
§8°4868, of winter, to 41°9,1463. 
From Dr. White’s, ard Mr. Wellby’s 
Observations, the mean annual heat at 
York corresponds to 49°, of spring to 
42%°, of summer to 632°, of autumn to 
563°, of winter to 36°. 
Before any stress can be laid upon ob- 
servations ot this kind, it will be neces- 
sary either to have a greater number of 
observations in each day, or 2 thermome- 
ter to tell the greatest and least height in 
the observer's absence. For the latter 
PHF Dose: that invented by Mr. Six, of 
anterbury, may-be used with great ad- 
Vantage. 
The mean annual quantity of rain fall- 
ing at Liverpool, deduced from an ave- 
$792, correspon 
the spring, the all ¢ 
524739, Inthe summer to 9,0516, 
autumn to 10,6889, im wmiter to 8,9025. 
The ‘gage was placed at the top of a 
house, forty-one feet above the highest 
water mark. Mean annual fall of rain at 
Dover, is estimated, from observations in 
five years, ending: with 1793, to.corre- 
spond to 37,52 inches. At Chatsworth, 
in Derbyshire, the average of annual falls 
for seven years, commencing with 1777, 
corresponded to 27,339 inches. Medium 
for fifteen years, ending with 1792, cor- 
responded to 27,865 inches. 
As.an easy way to calculate the fall of 
rain, a phial to receive it is recommended, 
graduated so as to. express its weight in 
Ounces and quarters, and a table is 
formed to compare the weight with the 
necessary height. It 1s presumed, that 
the instrument makers will not. lofe .the 
mnt; but, by having graduated phials 
for sale, afford to the curious an easy mode 
of determining the fall of rain in their 
respective abodes. ; 
‘The state‘of the winds has been taken 
from a seemingly very gecurate journal at 
Liverpool, made during twenty-five years, 
from 1768 to +792, inclusive, from which 
~\t appears, that the annual mean of the 
nortn-easterly winds. wes 175 days, and 
their velocity 84; of the south-westerly 
winds 170 days, and their velocity 10k, 
ds to 34,4168 inches. 
meen 
in 
‘ 
Mathematical Correfpondence. 
Aa ingenious mode is given of estimating =tation of a. reply from Mr. Travis, who, 
[March 
the velocity of the wind. Let a person 
fasten a ship log-line about his waist, and 
having fixed to the end of a cross stick a 
kerchief, let him run with such speed,that 
the kerchief may fall flat on the ftick, 
and consequently his velocity will be the 
same as that cf the wind. At that time, 
let another person attend to the log-glass 
and line, and the rate of his running, 
and of the wind’s motion may be deter- 
mined. % aT 
Eee 
MATHEMATICAL CORRE- 
SPONDENCE. ; 
To the Editor of the Monthly Magazine. 
SIR, 
T Have sele€ted from Mr. Marsh’s 
Letters to Mr. Travis, a theorem on 
manuscripts, which seems to deserve your 
attencion; and have also annexed the pre- 
vious history of its origin and object. 
The dispute on the famous text in the 
first epistle cf St. John, has led the way 
to many curious questions cn the validity 
of manuscripts, and the accuracy with 
which they were examined by the first 
editors of our Testaments. M. Marsh, 
a learned divine and. mathematician of 
niversity of Cambridge, about two 
‘s ago, returned to Engiand, to pub- 
| ranitlation of TViichaelis’s Intro- 
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the course of this work, upon consulting 
some manuscripts in the university lrbra- 
ry, he found in one, the name of Vata- 
blus, written at the beginning and end 
of the manuscript. This circumstance 
led him to the conjeéture, that, as Va- 
table was the intimate friend of Ste- 
phens, this might have been one of the 
manuscripts used, in an edition of the 
Testament, by that celebrated printer. 
To satisfy himself on this head, he con- 
sulted the marginal references in Ste- 
referred to by him, under the name of 
4%) tallied almost exaétly with the manu- 
script, by this comparison, now entitled 
to the name of Codex Vatabli. On this 
pce Mr. Travis put his negative, 
ecause, out of twenty-five singular 
readings of the ty, it agreed, he said, 
with the Codex Vatabli only in twenty- 
four. On this point, the two disputants 
are now at issue. Mr. Marsh brings 
strong arguments to prove, that Mr. _ 
‘Travis cannot shew cause for his asser- 
tion, that the :y and the Codex Vatabli 
did not agree in this twenty-fifth read- 
ing,iand the learned world is In expec~ 
by 
