Chapter II: The Progress of Modern Astronomy

(1) (p. 25). William Herschel, Phil. Trans. for 1783, vol. LXXIII. (2)
(p. 30). Kant's Cosmogony, ed. and trans. by W. Hartie, D.D., Glasgow,
900, pp. 74-81. (3) (p. 39). Exposition du systeme du monde (included in
oeuvres Completes), by M. le Marquis de Laplace, vol. VI., p. 498. (4)
(p. 48). From The Scientific Papers of J. Clerk-Maxwell, edited by W.
D. Nevin, M.A. (2 vols.), vol. I., pp. 372-374. This is a reprint of
Clerk-Maxwell's prize paper of 1859.