Intelligence and Miscellaneous Articles. 347 



The connexion of the several points in (1) will trace out the 

 northern limiting line of total eclipse, those in (2) the central line, 

 and those in (3) the southern limiting line of total eclipse. 



To indicate some of the principal places over, or near to which 

 the shadow will pass, a small map, on Mercator's projection, is 

 added (Plate IV.) ; representing the table from 43° to 49° of north 

 latitude, and from 1° to 21° of east longitude. The transverse curve- 

 lines represent arcs of vertical circles ; and for the same moment of 

 time, inserted above them, their intersections with the north, central, 

 and south lines respectively, represent the phsenomena numbered 

 1, 2, 3, previously explained. The central line will pass 

 North of Marseilles . . . 0°28' or 32-2 miles. 



South of Turin 27 or 31-0 ... 



North of Genoa 38 or 43-7 ... 



South of Milan 20 or 23-0 ... 



North of Verona 24 or 27-6 ... 



South of Vienna .... 32 or 36-9 ... 

 North of Buda 58 or 66-8 ... 



The beginning of the total eclipse at a place on the centrsil line, 

 being the contact of the eastern limbs of the moon and sun, and the 

 ending the contact of the western limbs, tlie interval representing 

 the duration of the total eclipse at any point will be about 2™'4. 



Should the darkness be sufficiently intense, as has been sometimes 

 the case during total eclipses of the sun, to render some of the 

 planets and brighter stars visible, the planet Mercury may be looked 

 for about 5° south of the sun and moon. The planet Mars about 

 west by north. Mars being IS'" of right ascension to the west, and 

 1° 16' of declination to the north of the sun and moon. Tlie planet 

 Venus is below the horizon until the shadow has passed Vienna, and 

 will scarcely be visible at the eastern limit of the map. Jupiter and 

 Saturn are invisible, being below the horizon during the whole in- 

 terval. The Georgian is 7^ 13" of right ascension to the west, and 

 23° 53' to the south of the sun and moon. 



The sun and moon are in the constellation Gemini, and will have 

 Castor and Pollux not far distant in a N.N.E. direction ; Ursa Major 

 to the northward and eastward ; Procyon to the south and east ; Orion 

 to the south and west ; Taurus to the west ; and Auriga and Perseus 

 to the north and west. 



Those persons who wish for more detailed information regarding 

 the circumstances and pha2nomena of solar eclipses, will be amply 

 gratified by consulting ' A Memoir relative to the Annular Eclipse 

 of the Sun, which wiU happen on Sept. 7, 1820, by Francis Baily 

 (London, 1818);' the works therein referred to, viz. Phil. Trans., 

 vol. xxix. p. 245, vol.xl. p. 177, vol. xlv. p. 582, &c. &c.; and a paper 

 by the same author, in the tenth volume of the Memoirs of the 

 Royal Astronomical Society, ' On a remarkable Phenomenon that 

 occurs in Total and Annular Eclipses of the Sun.' 



The memoir alluded to, though unfortunately not printed for sale, 

 was circulated vvitli the author's known liberality so widely, tliat 

 there is little doubt of its being to be found on the shelves of tiie 

 libraries of persons who feci interested in these matters. 

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