Celestial and 'Terrestrial Globes. 231

and all those places which pass under thatpoint, will be correspondents to that star,because they will be in the line palling fromthe center of the earth through the veryplace upon its surface, to which the star isat that time vertical. Thus,

The declination of the star marked y, inthe head of Draco, is 51 deg. 32 min. equalto the latitude of London; therefore thisbrilliant star of the second magnitude maybe called the star of this metropolis, withoutbeing deprived of its own name; it maylikewise take the name of any other placein the parallel of London.

The reverse of this problem being tofind all the stars which are correspondents toany place, is so easy as to require no far-ther explication, than that of applying firstto the terrestrial globe.

The apparent diurnal motion of one staronly, will successively shew its perpendicu-^larity to various countries, as will appear by

A general

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