[Footnote 538: _Astr. Nach._, No. 1,737.]
[Footnote 539: _Correspondence with Newton_, pp. 181-184; Ranyard, _Mem.
Astr. Soc._, vol. xli., p. 501.]
[Footnote 540: S. P. Langley, _Wash. Obs._, 1876, App. iii., p. 209; _Nature_, vol. lxi., p. 443.]
[Footnote 541: Schuster (_Proc. Roy. Soc._, vol. x.x.xv., p. 154) measured and photographed about thirty.]
[Footnote 542: Abney, _Phil. Trans._, vol. clxxv., p. 267.]
[Footnote 543: _Proc. Roy. Soc._, vol. x.x.xiv., p. 409. Experiments directed to the same end had been made by Dr. O. Lohse at Potsdam, 1878-80. _Astr. Nach._, No. 2,486.]
[Footnote 544: The sensitiveness of chloride of silver extends from _h_ to H; that is, over the upper or more refrangible half of the s.p.a.ce in which the main part of the coronal light is concentrated.]
[Footnote 545: _Proc. Roy. Soc._, vol. x.x.xiv., p. 414.]
[Footnote 546: _Report Brit. a.s.soc._, 1883, p. 351.]
[Footnote 547: Maunder, _Indian Eclipse_, p. 125; _Eclipse of 1900_, p.
143.]
[Footnote 548: _Astr. and Astrophysics_, vol. xiii., p. 662.]
[Footnote 549: See _infra_, p. 197.]
[Footnote 550: Abney, _Phil. Trans._, vol. clx.x.x., p. 119.]
[Footnote 551: _Comptes Rendus_, t. xcvii., p. 592.]
[Footnote 552: _Memoirs National Ac. of Sciences_, vol. ii., p. 102.]
[Footnote 553: _Wash. Obs._, 1867, App. ii., p. 64.]
[Footnote 554: _The Sun_, p. 357.]
[Footnote 555: _Proc. Roy. Soc._, vol. xvii., p. 289.]
[Footnote 556: _Comptes Rendus_, t. lxxiii., p. 434.]
[Footnote 557: _Wash. Obs._, 1867, App. ii., p. 195.]
[Footnote 558: Stokes, Anniversary Address, _Nature_, vol. x.x.xv., p.
114.]
[Footnote 559: _Comptes Rendus_, t. ci., p. 50.]
[Footnote 560: _Harvard Annals_, vol. xviii., p. 99.]
[Footnote 561: Wesley, _Phil. Trans._, vol. clx.x.x., p. 350.]
[Footnote 562: _Harvard Annals_, vol. xviii, p. 108.]
[Footnote 563: _Lick Report_, p. 20.]
[Footnote 564: _Ibid._, p. 14.]
[Footnote 565: _Ibid._, p. 155.]
[Footnote 566: _Pub. Astr. Soc. of the Pacific_, vol. iii., p. 158.]
[Footnote 567: Professor Holden concluded, with less qualification, "that so-called "polar" rays exist at all lat.i.tudes on the sun"s surface." _Lick Report_, p. 19.]
[Footnote 568: Holden, _Report on Eclipse of December, 1889_, p. 18; Charroppin, _Pub. Astr. Soc. of the Pacific_, vol. iii., p. 26.]
[Footnote 569: Published as the Frontispiece to the _Observatory_, No.
160.]
[Footnote 570: Wesley, _Ibid._, p. 107.]
[Footnote 571: _Lick Observatory Contributions_, No. 4, p. 108.]
[Footnote 572: _Astr. and Astrophysics_, vol. xiii. p. 307.]
[Footnote 573: Lockyer, _Phil. Trans._, vol. clx.x.xvii., p. 592.]
[Footnote 574: He died in London, November 20, 1898.]
[Footnote 575: _Bull. Acad. St. Petersbourg_, t. vi., p. 253.]
[Footnote 576: W. H. Wesley, _Phil. Trans._, vol. cxc, p. 204.]
[Footnote 577: _Lick Reports on Eclipse of January 1, 1889_, p. 204.]
[Footnote 578: _Astroph. Jour._, vol. xi., p. 226.]
[Footnote 579: _Observatory_, vol. xxi., p. 157.]
[Footnote 580: _The Indian Eclipse_, 1898, p. 114.]
[Footnote 581: _Science_, June 22, 1900; _Astroph. Jour._, vol. xii., p.
370.]
[Footnote 582: _Ann. der Physik_, Bd. xlviii., p. 528. See also Wood, _Physical Review_, vol. iv., p. 191, 1896.]
[Footnote 583: _Science_, August 3, 1900.]
[Footnote 584: _Lick Observatory Bulletin_, No. 9.]
[Footnote 585: _Observatory_, vol. xxiv., pp. 321, 375.]