NEBULA, CLUSTERS, ETC. 



17 



Hall, Maxwell : Nature. 1877. Jan. 11, p. 244. [Observations of the 

 variable nebula near Mcrope Pleiadum ; it was bright Oct. 20, 

 1876.] 



Halley : P. T., xxix, 1715, p. 390. [Catalogue of 6 nebulae.] 

 : P. T., 1720, p. 22. 



Harding : Verz. der Nebelflecke, etc., von Messier, mit Beriicksichtigung 

 der Herschelschen Cataloge. Kleine Astron. Ephem., 1834. 



: Acbt neue Nebelflecke. B. J., 1827, p. 134. 



Harvard College Observatory : Annals. 



[Heis :] His Atlas Ccelestls contains 6 nebulas visible to the naked eye. 



[ :] [Is said to have made many drawings of nebula?. Nature, 1877, 



July 12, p. 213.] 



Helmert : Der Sternhaufen im Sobieskischen Schilde. Pub. d. Hambur- 

 ger Ster?iw., No. 1, 1874. 4°. [200 stars.] See also V. J. S., 

 1875, p. 111. 



Helraholtz : Am. Jour. Sci., 2d series, xxiv, p. 203. [Nebular hypothesis.] 



Herschel, Carolina: Zone catalogue of nebula? reduced to 1800.0. Mss. 

 in possession of Royal Society of London. See Herschel's 

 general catalogue of nebulas, etc., p. 2. See also p. 6, [same 

 work,] for an account of the various Herschel Mss. at Bur- 

 lington House. 



Herschel, J. : Results of astronomical observations at the Cape of Good 

 Hope. 4°. 1847. [Figures of sixty nebulas.] 



: Essays from the Edinburg and Quarterly Reviews, London, 1857, 



8°, p. 286. [Review of Humboldt's Cosmos, and views of 

 nebulas,] ; p. 660. [Address as President, B. A. A. S., 1845] 

 See below. 



: Outlines of Astronomy. 8vo. Many references to his own and 



other observations of nebulas. 



