Meteorological Observations. 265 
Arr. VII.— Abstracts of Meteorological Observations made at St. 
Johns, Newfoundland, and at Canton, in China: with some 
Notice of the Half Yearly Inequalities of Atmospheric Distri- 
onl which appear in these Observations ; by W. C. Rep- 
THe annexed summary of meteorological observations at St. 
Johns, was kindly furnished by Joseph Templeman, Esq., having 
been printed by him for circulation. The summary for ten years 
at Canton, in China, was obligingly forwarded by John Slade, 
Esq., and has appeared in the Canton Register. A comparative 
half yearly analysis of these observations, aud of those made BY 
me at New York, is herewith submitted. 
Observations at Ni siefoiindtdnd: 
The observations at St. Johns include a period of five years, 
ending with 1838. The barometer, we are informed, is 140 feet 
above the sea Jevel. 'The annual mean of the barometer, dedu- 
ced from these observations, is 29.735 inches; while the mean 
of my own observations near the sea level at New York, for the 
same period, is 30.111 inches :*—showing a difference in the 
mean atmospheric pressure of 0.376 inch; or more than one third 
of an inch of the barometric column.t Part of this difference, 
equal to about 0.180, is due to the difference of elevation of the 
two instruments; which when added, gives 29.915 inches for the. 
Sea level at St. Johns. If we assume the annual mean at the 
two places to be equal, there still remains a discrepancy of 0.196, 
ot t inch, nearly, to be accounted for. In the absence of more 
definite in fomtnsieis concerning Mr. Templeman’s barometer, [ 
am inclined to ascribe this discrepancy to the stretching of the 
leather which forms the bottom of the cistern, while in a moist 
At a mean temperature of the mercury of about 68° or 70° F. 
t Thad recently an opportunity to compare the adjustment of my ot eo 
barometer with the standard of the Royal Society, as Srna by means of one 
e of Lieut. Riddell, R. A., 
of the permanent allowance I had made for the eapillarity of the tube; the diai 
eter of which is four fifteenths of an inch, 
Vol. xxxvii1, No. 2.—Jan.—March, 1840. 34 
