200 HISTOEY OF ASTBONOMY. 



Mr. Bond, with, the great telescope at Cambridge, has 

 also seen this nebula partially resolved. To him the head 

 of the nebula appears composed of several clusters of 

 stars, the components being separately seen for a moment 

 under favorable circumstances. 



Mr. Lassell observed the nebula of Orion with his 

 twenty feet equatorial at Malta under the most favorable 

 circumstances. The following are extracts from his 

 journal: 



" 1852, Dec. 6. Viewed the nebula with powers 219 ; 260 

 and 1018. With the latter power, a new phase was given 

 to the nebula, which seemed like large masses of cotton 

 wool packed one behind another ; the edges pulled out 

 so as to be very filmy. 



" Dec. 8. I applied a power of 1018, with which there 

 is no appearance of resolvability. The whole aspect is 

 that of a number of masses of fleecy cloud, thin at the 

 edges, and packed one behind another, appearing to be 

 a deep stratum of successive layers of nebulous sub- 

 stance. 



"Dec. 15. A few more stellar points, I believe, appear 

 than I have mapped down in my Starfield diagram, and 

 the stars contained in those diagrams are very much 

 brighter. With power 1018, the wool-like masses appear 

 as I have previously described them, and there is no dis- 

 position whatever in them to turn into stars." 



The Great Nebula in Andromeda has also been care- 

 fully observed with the Cambridge telescope. The most 

 conspicuous features were the sudden condensation of 



