[1] A small pair of globes, that will answer every purpose required by the readers of these Letters, may be had of the publishers of this Work, at a price not exceeding ten dollars; or half that sum for a celestial globe, which will serve alone for studying astronomy.

[2] From two Greek words, τηλε, (tele,) far, and σκοπεω,(skopeo,) to see.

[3] Brewster's Life of Newton

[4] Bonnycastle's Astronomy.

[5] Library of Useful Knowledge: History of Astronomy, page 95.

[6] Sir J. Herschel.

[7]A tangent is a straight line touching a circle, as A D, in Fig. 28

[8] Dick's 'Celestial Scenery,' Chapter IV

[9] Dick's 'Celestial Scenery.'

[10]

[11]The exact longitude of the City Hall, in the city of New York, is 4h. 56m. 33.5s.

[12] You will recollect that the sun is said to be at the node, when the places of the node and the sun are both projected, by a spectator on the earth, upon the same part of the heavens.

[13] Altissimum planetam tergeminum observavi. Or, as transposed, Smaismrmilme poeta leumi bvne nugttaviras.

[14] In imitation of Galileo, Huyghens announced his discovery in this form: a a a a a a a c c c c c d e e e e e g h i i i i i i i l l l l m m n n n n n n n n n o o o o p p q r r s t t t t t u u u u u; which he afterwards recomposed into this sentence: Annulo cingitur, tenui, plano, nusquam cohærente, ad eclipticam inclinato.

[15] Dick's 'Celestial Scenery.'

[16] Dick's 'Celestial Scenery.'

[17] The names of all the asteroids known at present are as follows:

[18] Sir John Herschel, however, states its diameter at 41,500 miles