Calendar: 1893-1894 Page 446

444 DEPARTMENT FOR LADIES telescopic power-Giant reflectors and refractors their advantages and disadvantages-Mountain observatories- The equatorial Coude General survey of the starry heavens-Scintillation of the stars-Number of stars visible to the naked eye and in large telescope The constellations-Star catalogues-Designation of stars their proper motion and the motion of the sun in space-Distances of some stars from the earth and methods of measurement Elementary principles of spectrum analysis-The spectro- scope applied to the study of the stars-Stellar chemistry- Four orders of stars their relative ages-Celestial photo- graPhy Double and multiple stars -Distinction between optical and physical doubles- Double stars can be weighed but not measured-Special double stars Colouied suns and the worlds ruled by them-Variable stars and their attendant worlds-Temporary stars- Spectroscopic evidence of the physical changes going on in them Star clusters and Nebulae -Sir HerschelPs classifies tion-Spectroscopic evidence as to the nature of Nebulae- Evidences of progressive change-Worlds forming- Varieties of Nebulae-Relative distribution of stars and Nebula3-Cosmogony and the Nebular hypothesis-The star depths astir with life and change Fee £1 5s The first Lecture will be free