Celestial and terrestrial Globes, 59

equator, upon the surface of either globe;it being not only the most natural, butthe largest circle that can possibly beapplied for that purpose. This is doneby a semi-circular wire ÆF placed in theplane of the equator, carrying two indices;one of which 1 is occasionally to be used to?point out the time.

As the first meridian in our new globespastes through London, it therefore becomesthe XII o’clock hour circle; and this fallsupon the intersection of the equator andecliptic at the first point of Aries; theother Xllth hour circle pastes through theopposite intersection at the first point ofLibra.

Remember, when the globe shall behereafter rectified for London, or any o-ther place, on the same meridian witht, that then the graduated side of thestrong brass meridian is the horary indexitself.

It may happen, that the globe shall be sorectified, as that the two points of XII o’clockwill fall in, or so near, the east and westpoints of the broad paper circle, that neitherpf the horary indices can be applied thereto;

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