434 
attempted one without fuccefs, but the 
high eftimation and popularity which M. 
pe ZACH enjoyed have given fufficient 
reputation to his work, to infure its 
fale, and confequently the continuation of 
that ufeful undertaking. 
M. MartTonFl, has publifhed, in 
Tranfylvania, the defcription of the 
obfervatory which the count-bifhop 
BRatthiani had ereéted at Carlfburg, Alba 
Fulia, called alfo Weiflemburg, and Alba 
Carolina. 
M. TRiresNECKER, at Vienna, has 
publifhed a confiderable work on the 
eclipfes of the fun and ftars ; he has cal- 
culated more than 150 obfervations, which 
mutt neceflacily be a voluminous work ; 
fcarcely any were made before 1760, the 
time when I began to give the example of 
thefe fort of calculations. 
We learn that a volume has been pub- 
lithed at London, of ‘* Obfervations,” by 
Dr. BRADLEY, awork which has been 
long expected. 
M. DE MeENnpDozA, has publifhed at 
London, in 1797, °* Confiderations on the 
Solutions of the principal Problems of Nauti- 
cal Aftronomy, with tables of verifed fines 
from 10 to 10 feconds, and an auxiliary 
table which reduces the inveftigation of 
the true diftance to anaddition of five verfed 
fines. 
We have received the ephemerides of 
Bologna, for 12 years, from 1799 to 
1810, by citizen MATEUCCI, affifted by 
citizens ALAMANNI, GUGLIELMINI, 
SACCHETTI, and CANTERZANI the fon. 
Since the commencement of the century, 
the academy of fciences had publifhed 
ephemerides 10 years before. “The laft 
voluines are by DESPLACE, LACAILLE, 
and me. I had finifhed at 1800, old ftyle ; 
the embarrafiments of commerce had pre- 
vented me from finding a bookfeller to 
enable me to proceed with the feries, and 
I defifted from the calculations. The 
aftronomers of Bologna, more fortunate 
than I, have fupplied this defect, and we 
fhall have an ephemerides 12 years in ad- 
vance, for the ufe of fuch as fhall make 
almanacks for a number of years to come. 
The ephemerides of Milan, for 1798, 
contain the continuation of a great work 
of citizen ORIANI, on the methed of cor- 
rvecting the elements of the tables of Mer- 
cury, by observations; as alfa many in- 
tereting obfervations by citizens REGGIO 
and pE CESARIS. 
M. ScHROETER, at Lilienthal, has 
publifhed the fecon: volume of his ‘* Affro- 
mifche Beytrage,’ in which, among other 
things, we find the apparent diameters 
Lalande’s Hiftory of Aftronomy, for 1798. 
Z 
[July 
of the fatellites ; nine-tenths of a fecond 
for the fecond, and a fecond and 2 half for 
the third. 
M. Bone, at Berlin, has publithed a 
new volume of ephemerides for 1801, and 
a third volume of fupplements for the 
preceding volumes, which contain many 
aftronomical obfervations and memoirs, — 
by the aftronomers of Germany, France, 
and England. This work is like that of 
M. DE ZACH; it is a repertory which 
aftronomers will find indifpenfible. 
We have received alfo a volume in 
folio of tables of logarithms, publifhed 
in 1794, by M. VeGa, officer of artillery 
in the fervice of the emperor. The tables 
of Wlacq, both for the hundred thou- 
fands, and for tke fines from ten to 
ten feconds, with eleven cyphers, pub- 
lifhed in 1628, and 1633, had become 
very fcarce ; they had never been reprint- 
ed, and yet were frequently wanted. M. 
VeGa has therefore rendered a fervice to 
the public, by procuring this valuable 
edition. 
M. ScHuBERT has publifhed at Pe- 
terfburg, in German, a large treatife on 
aftronomy, in 3 volumes quarto, making 
in all near goo pages. 
In the Geneva ‘Bit lothequeBriiannique,” 
for the months of March and April, we 
find interefting details on the method em- 
ployed by M. Buair to correét the dif- 
ference of refrangibility in profpeétive- 
glaffes. Effentia] oils, felution ‘of cor- 
rofive fublimate in fpirits of wine, with 
the addition of a little fal-ammoniac ; but- 
ter (muriate) of antimony diluted in 2 
little ether, or alcoho], mixed with fome 
drops of marine acid, have fucceeded per- 
fectly well, by putting thefe fubftances 
between two lenfes of crown-glafs (Edin« 
burgh Tranfactions, vol. iii.), He has made 
a very good objett-glafs with felution of 
fal-ammoniac and of fublimated mercury, 
(muriate of ammoniac and of mercury.) 
He has afcertained that the different fub- 
ftances have not a fimilar difpofition to 
colours, which Boscowrcy had already 
noticed in 1765. Laftl:, he has calcu- 
lated the curvatures of glaffes, fo as to 
correct alfo the aberration of {phericity. 
This curious memoir has been tranflated 
into French; but citizen Leg@y has re- 
tained the manu(cript for three years patt. 
We are indebted to citizen Pierer for 
having given it in detail in his excellent. 
collegétion of La Brblicthique Britannique;” 
the author calls thefe glaffes aplanatic, (or 
without error.) 
I bavé publifhed a new edition of the 
{phere and of the calendar of Rivarp, an 
exce llent 
