[21] Sir J. Herschel’s estimate of the “temperature of space” was 239°F.; Pouillet’s 224°F. below zero. Both are almost certainly much too high. See Taylor, “Bull. Phil. Soc. Washington,” vol. ii. p. 73; and Croll, “Nature,” vol. xxi, p. 521. [22] This is true only of the “normal spectrum,” formed by reflection from a “grating” on the principle of interference. In the spectrum produced by refraction, the red rays are _huddled together_ by the distorting effect of the prism through which they are transmitted. [23] Am. Jour. of Science, vol. xx. p. 36. [24] Am. Jour. of Science, vol. xx. p. 41. [25] Report of the Paris Observatory, “Astronomical Register,” Oct. 1883; and “Observatory,” No. 75. [26] Hipp. ad Phaenomena, lib. i. cap. xiv. [27] Cosmos, vol. iii. p. 272 _note_. [28] Am. Jour. of Science, vol. xx. p. 437. [29] Nature, vol. xxiii. p. 19. [30] An expression used by Mr. Warren de la Rue. [31] Optice, p. 107 (2nd ed. 1719.) “Author’s Monitio” dated July 16, 1717. [32] “Der grosse Mann, der edle Pedagog, Der, sich zum Ruhm, ein Heldenvolk erzogen.” [33] “Zwar sind sie an das Beste nicht gewöhnt, Allein sie haben schrecklich viel gelesen.” [34] “Zwanzig Jahre liess sich gehn Und genoss was mir beschieden; Eine Reihe völlig schön Wie die Zeit der Barmeciden.” —_West. Div._ [35] “Sicherlich es muss das Beste Irgendwo zu finden sein.” [36] “Dass die Welt, wie sie auch kreise, Liebevoll und dankbar sei.” [37] “Will ich in Kunst und Wissenschaft, Wie immer, protestiren.” [38] “An diese Religion halten wir fest, aber auf eine eigene Weise.” [39] “Was kann der Mensch im Leben mehr gewinnen, Als dass ihm Gott-Natur sich offenbare?” [40] “Von der Société St. Simonien bitte Dich fern zu halten;” so he writes to Carlyle. [41] “Usi Natalizi, Nuziali e Funebri del Popolo Siciliano descritti da G. Pitrè.” [42] Edward, second Earl. His father, Robert Harley, first Earl, was Treasurer under Queen Anne. [43] The friend and correspondent of Dean Swift, Mrs. Delany, and other people of note in her day. [44] This criticism was passed in reference to the comic scenes in “Henry IV.” and “Henry V.” [45] A Cornish borough, now disfranchised. [46] See Eclectic Magazine for December, 1884. [47] Egypt, No. 1, 1878. [48] Egypt, No. 9, 1884. [49] See Egypt, No. 12, p, 132-133. [50] _Times_, September 12. [51] See Egypt, No. 12, p. 226. [52] Egypt, No. 8, 6. [53] Ibid., No. 12, 169.