OBSERVATORY. 
) 
pofition, regard muft be had to the wlan of building and 
the number muit alfo depend on the fame, as well as on the 
number of obfervations to be made. n obfervatory, how- 
ever, cannot be confidered as well furnifhed without the fol- 
lowing apparatus: a tranfitinftrument, or mural tranfit circle, 
with good clocks to fhew both folar ree fidereal time ; and 
chronometers alfo are often ufeful. ral quadrants or fex- 
tants may be likewife mentioned; but eae circles are greatly 
preferable, as they admit of various felf-correéting adjuft- 
ments, particularly when fitted up with revolving micro- 
nes A portable oe circle fhould alfo form part of 
the apparatus, in order to meafure angular diftances in all 
direGtions, horizontal, etic, and oblique. If there bea 
circular inftrument that will meafure both altitudes and azi- 
muths, or an equatorial inftrument, then a moveable dome 
will be neceffar 
zenith feGtor is likewife of i importance, and of courfe 
good telefcopes are eflential, efpecially an achromatic with . 
equatorial movement and a micrometer eye-piece 
powerful refleGtor for obferving the phafes of the a nse: 
and planets, as well as t the fatellites, nebulz, 
fa 
e found in this work, under their proper 
heads, with rules and examples for their ‘ufe and application. 
A Tasie of the Longitudes and Latitudes of the iibeo Obfervatories of Europe, as deduced from the moft recent 
and accurate Determinations. 
Names of Places. Pek Sead " Latitude North. Names of Places. oe. Latitude North. 
hom $ ot " h mi s oO ft ou 
Amfterdam - - — 0 Ig 32 52 22 77 Madrid - - + 014 47 40 25 18 
Armag - = -- 0 26 30 54 21 15 Mashim -~ - — © 33 55 49 29 18 
Berlin - - - — © 53 26 52 3i 45 Marfeilles- - — 0 21 29 43 17 50 
Blenheim -- - + 0 5 25 51 50 28 Milan - - — 0 36 45 45 28 2 
Bologna - - — 0 45 23 44 29 56 Mirepoix = - - + 0 7 30 43 5 19 
Bremen : - — 0 35 12 53 4 46 - - I 34 51 56 39 6 
Breflaw - = — 1 811 5% 6 30 Montauban - - — 0 13 19 49 0 55 
Brunfwick - - — 042 8 52 15 29 Montpelier - - — O15 31 43 36 29 
Buda - - - — I 16 Io 47 29 44 ofcow - - — 2 30 12 55 45 45 
Cadiz - -  - + © 25 f0 36 32 «+1 Munich - - — © 46 20 48 8 20 
Cambridge - - —o o1 52 12 36 Naples -  - — O57 § 40 50 If 
Caffel - - —0o 38 7 51 19 20 Nuremberg - - — 0 4417 49 26 55 
 - - | + 0 33 37 40 12 30 Oxford ~ - +o 5 2 51 45 38 
Conftantinople = - — 1 55 41 4I 1 27 Padua - - — O47 32 45 24 2 
Copenhagen - — o 50 18 55 41 4 Palermo - - — O 53 21 38 6 44 
ac - — 1 19 50 3 52 Paris - - - —o 21 48 50 13 
Ganiacuiee - — 0 56 32 48 3 29 Peterburg - - ® 1 13 59 56 23 
Dantzic - - — I 14 32 54 20 48 Pifa — oO 4I 26 43 43 11 
orpat - — I 46 55 58 22 48 Bortfnouth Academy +O 4 24 50 48 2 
Drefden - - | — 0 5450 | 51 3 9 rague — 95741 | 50 5 19 
ublin - - + 0 25 20 53 23 14 Ratifbon = - - — o 48 26 49 0 58 
Eifenberg - = - — © 39 50 50 57 58 Richmond - — - +o 115 51 28 8 
Florence - - — 0 45 43 46 41 Rome - - - — 0 49 51 41 54 1 
enoa - - — 0 35 52 44 24 59 Slough - - + 0 224 | 51 30 20 
Glafgow- - + O17 4 So $1 32 Stockholm - : — 1 12 13 59 20 31 
Gotha (Seeberg) 7 — 0 42 56 5056 7 Strafburgh - = - ge ao 48 34 56 
Gottin - — 0 39 42 SI 31 54 Touloufe - —o 5 46 43 35 46 
Cnet h - - © 0 Oo 51 28 40 Turin - - - — © 30 4o 45 4 14 
Highbury Houfe - t O 0 23 5I 33 30 pial - - — I 10 36 59 51 50 
yeres - - — 0 24 31 43 7 2 Utrecht ~ - — © 20 27 52 5 12 
Leipfic - - — 0 49 28 51 20 44 Venice - - —- 0 49 24 45 25 54 
Leyden - = —o17 55 62 0 30 Verona - - — 044 1 45 26 6 
ie - — 0 35 35 53 8 25 Vienna - — 1 § 31 48 12 36 
Lifbon - - + 0 36 34 38 42 5 Viviers - - o 18 41 44 29 13 
i sscen (Chr. Hof.) + 0 0 24 e 30 . Wilna- -— - I 41 10 54 41 2 
The fign —- denotes Eaft Longitude, and the fign + Weft Longitude, by which it is to be underftood that 
te. 
addition or fubtr. 
the Greenwich Obfervatery. 
Gion muft be applied to the time of any given place, in order to find the correfponding time at 
OBSER« 
