2 
ume of the Transactions of the Roy. Ast. Soc. — But there is the 
same necessity, (grounded on the incorrectness of : magnitudes, as. 
laid down in all existing charts,) for wit ne of the northern as 
~ well as southern stars in this respect.» It therefore becomes 
worthy of consideration, whether a otaaiien plan may not advan- _ 
tageously be carried into execution in both hemispheres, © Andas 
at all events, the actual state of the celestial charts in both is such 
as to admit of great improvement from an assemblage of more 
correct photometric data, a general review of all the stars, down 
to the fifth magnitude, with this especial object in view, has 
been undertaken by one of the members of the committee, con- 
ducted on the same plan, the principle of which is explained in 
the paper alluded to. This review is in a state of considerable 
advancement, and should cireumstances and weather favor, will 
probably be completed before the next meeting.”’ 
On the reduction of Meteorological Observations made at the 
Solstices and Equinoxes. Sir J. Herschel reported, that the 
whole number of series in hand, amounts to more than three 
hundred, being the results of observations at about sixty stations. 
During the past year, Mr. Birt has been employed in tabulating, 
reducing, projecting and comparing the barometric curves, a 
cess which has been completed for the whole of the American 
group, (which is by far the most numerous and consecutive,) for 
the years 1835, 1836, 1837, and for March, 1838, comprising 
eighty eight series made at twenty eight stations. * * The 
tabulated results of these reductions and their projected curves 
accompanied the Report. 
The Astronomer Royal made report on the publication of the 
Hourly Observations made at Plymouth, under the superintend- 
ence of Mr. W. 8. Harris. 1. The first series of observations 
for the thermometer extends from May, 1832, to Dec. 1836, and 
contains readings for every hour of the day and night. ‘The 
means of the readings are taken for each day, and for each hour 
the means of groups of ten or eleven days are taken. 2. The 
second series extends from Jan. 1837 to Dec. 1839, and contains 
readings of the wet and dry thermometer for every hour of the 
day and night. ‘The means of the readings are taken for each 
day. 3. The barometrical observations extend from Jan. 1837 
to Dec. 1839, and contain readings of the barometer and attached 
thermometer for every hour of the day and night. » The: 
