Imperial Almanack. 383 
time of apparent noon; or in other words, the time that will be 
indicated by a clock- truly regulated when the sun is on the meri- 
dian. This, though a very simple change, is a real improve- 
ment, 
At the foot of the calendar pages, we have, for every sixth day, 
the declination, time of southing, and meridian altitude at Lon- 
don, of the principal planets. The last is, evidently, a very use- 
ful column. The declination and time of culmination of Ceres, 
are given for every eighth day. ‘The principal astronomical 
facts and phenomena that will occur in each month are duly an- 
nounced: and there is further for each month “ aruled page to 
Sacilitate the keeping of a meteorological register. 
The remainder of the Almanack is miscellaneous, containing 
a variety of interesting synoptical tables, su arranged as to com- 
prise much in comparatively small compass. After a brief notice 
of the eclipses and of the approaching transit of Mercury, there 
are inserted short accounts of the Jewish, Mahometan, and Ro- 
man calendars; the two first of which are suited to the year 
1822. Then follow in the order here specified, the Elements of 
the Solar System; a comprehensive table of ‘Terrestrial latitudes 
and longitudes; a general survey of the earth; tables of the po - 
pulation and cultivation of Great Britain, of the principal cities 
and towns, of the colonies and dependencies; the nnmber of 
British peers at different periods; amount of revenue at different 
epochs, of national debt at ditto; a syllabus of employments, and 
a-view of the value of exports and imports. Next to these are 
given tables of bishops, deans, &c. with the extent, and num- 
bers of prebendaries, canons, livings, &c. in each diocese, and 
of the principal dimensions of the English cathedrals. Other 
tables relate to the probabilities of life, the London Bills of 
Mortality, the altitudes of mountains in different parts of the 
‘world,—of perpetual snow in different latitudes, of edifices. 
Then we have three interesting chronological tables, of which 
one exhibits the dates of geographical discoveries, one the dates 
of astronomical discoveries, the other of astronomical and nau- 
tical inventions. Among these we were glad to observe in their 
proper places, the dates of the invention of Davis’s sea-quadrant, 
of Norwood’s measurement of a degree, of Hutton’s computa- 
tion of the earth’s mean density, of Barlow’s magnetical dis- 
coveries, and of the invention of Dr. Pearson’s micrometer. 
Parry’s arctic discoveries, and Smith’s discovery of South Shet- 
land, are also very properly recorded. The five last tables re- 
late to specific gravities. Thermometric criteria of interest- 
ing chemical pheenomena, European itinerary measures, value of 
English coins at different epochs, and curious results of com- 
putations and experiments. 
The 
