Nebula of Orion : its changes 1811 



616 BIBLIOGRAPHY OF HERSCHEL's WRITINGS. 



Subject-Index. Philosophical Transactions. Tear. Page. 



Mimas : observations 1790 473 



Minimum visible : (naked eye) 1780 340 



: 1782 95,96 



: to tbe naked eye and telescopes 1805 33 



MiraCeti: 1780 338 



: has a period of 331 days, 10 hours, 19 minutes 1792 25 



MOLINEUX - 1782 84 



Moon : observations of its mountains 1780 507 



: three volcanoes observed 1707, April 19 and 20 1787 230 



: eclipse 1798, Oct. 22 1792 27 



: observations of its mountains 1794 41 



: is probably inhabited 1795 65 



Mountains? in Venus 1793 202 



Mountains of the Moon : see Moon. 



Multii)le stars : examples [and figures] of possible systems 1802 487 



Naked eye : can distinguish a square from a circle 2' in diameter 1780 340 



: 1782 95,96 



321 

 323 

 : itsdistance 1811 322 



r 442 



Nebulae : drawings of, etc 1784< to 



( 446 

 : are often surrounded by spaces vacant of stars 1784 448 



{ 214 

 : theoretical view of their various forms 17S5< 215 



( 216 



: planetary 1785 263 



: were plotted on a map 1786 467 



: may all be clusters of stars 1802 497 



: order of evolution 1811 325 



: their proper motions 1814 249 



: drawings 1814 284 



: observations of many of Messier's 1814 274 



: 1818 431 



: may not be distant clusters after all 1791 84 



: catalogues. See Catalogues. 



Nebuhc : Messier's. See Messier. 



NebuliB and Stars : their connection 1814 249 



Nebulae are arranged in strata 1784 442 



Nebulae (double) : their cause 1811 285 



Nebulae (planetary) : may become stars 1811 318 



: they rotate on their axes 1811 319 



Nebular hyi^othesis : see Construction of the heavens. 



Nebulosity : may be close to our system 1802 499 



: diffused nebulosity is plentiful '. 1811 272 



Nebulous matter : its nature 1791 85 



: is elastic 1811 313 



f 309 

 : is partly opaque 1811 < 313 



( 325 



Nebulous stars : in general 1791 71 



: observations of special ones 1791 78-82 



