Celejlial and 'Terrestrial Globes. 107

stands : the central solar ray will now de-scribe the 20th parallel of north declination,which will be about the 23d of July.

If the globe be moved in this mannerfrom point to point round the circumferenceof the chalked circle, and care be taken atevery removal that the north end of themagnetic needle, when settled, points tothe degree of the variation, the north poleof the globe will be observed to recede fromthe line connecting the centers of the earthand fun, until the globe is placed uponthe point Cancer : after which, it will atevery removal tend more and more to-wards the said line, till it comes to Capri-corn again.

PROBLEM XII.

To rectify either globe to the lati-tude and horizon of any place.

189. If the place be in north latitude,raise the north pole; if in south latitude,raise the south pole, until the degree of thegiven latitude, reckoned on the strong brassmeridian under the elevated pole, cuts theplane of the broad paper circle; then this

circle