Celestial and 'Terrestrial Globes. 93

Also all those stars which are in the fameparallel upon the celestial globe, have thefame declination.

And as the ecliptic is inclined to the equa-tor in an angle of 23 \ degrees, and is in-cluded between the tropics, every parallelin the torrid zone must necessarily cross theecliptic in two places; which two pointsshew the fun’s place, when he is verticalto the inhabitants of that parallel; and thedays of the month upon the broad papercircle answering to those points of the eclip-tic, are the days on which the fun passes di-rectly over their heads at noon, and arecalled their two midsummer days : whencethe inhabitants of the torrid zone have twosummers and two winters every year.

Hence as the earth’s progressive, or ratherapparent annual motion, seems to be imthecelestial ecliptic, the fun’s declination isthereby changed gradually every day. There-fore on our new terrestrial globe, as men-tioned in art. 173. we have drawn parallelsthro’ the whole space of the torrid zone, andthe two spaces within the polar circles, togive a general and clear idea of the fun’s ap-parent passage from one tropic to the other.