150 Lidentaliuns in the Sun's Edge. — Steam Engines. 



t>un is surrounded. ^ — Now although solar spots are not of uncom- 

 mon occurrence, their magnitudes and motions, compared with 

 the sun's disk, are so small, and the chances, during the sun's 

 appearance, of observers being at their telescopes at the proper 

 times for seeing a spot, or hollow of sufficient depth, on the appa- 

 rent edge of the sun, are in consequence so small, that Dr. Her- 

 schel has not more than once or twice since, been able to repeat 

 his observations on tlie indented edge of the sun, and numerous 

 telescopic observers have never yet been gratified by this curious 

 sight. 



It happened on Fridav, January 31st last, at one o'clock in 

 the afternoon, that two hollows, producing indentations, were 

 at the same time coming on the sun's disk, in the lower right- 

 hand quarter, as seen through a reversing telescope with a mag- 

 liifying power of 1 00 times. Mr. Henry Hubert, coal-merchant, in 

 Little Aijingdon-street, Westminster, was then trying an excellent 

 four feet Dollond's achromatic, which he had recently purchased, 

 searching for small spots on the sun's disk ; and he saw, near to- 

 gether, two conspicuous and large indents in the otherwise re- 

 markably true and circular disk of the sun, as mentioned above; 

 that which appeared lowest was by far the broadest and deepest 

 indent, extending to a great depth upon the face of the sun's 

 disk (beyond the apparent loss of substance therein); the bottom 

 or inner edge of them aj)peared irregular, and not circular. There 

 were a nuniber of small spots, about ten or twelve in a group, 

 at a small distance from the above indentations. Mr. Hubert 

 was iri hopes of being able to repeat his observations some days 

 afterwards, but clouds intervened at the time of the indentations 

 passing off the opposite edge of the sun's disk. 



STEAM ENGINES IN COHNWALL. 



The average work of 27 engines, reported by Messrs. Lean, 

 for January, was 23,373,320 pounds of water lifted one foot with 

 each bushel of coals consumed. 



During the same month Woplf's engine at Wheal Abraham, 

 loaded 14-9 pounds per square inch in engine cylinder, lifted 

 43,368,479 poui.ds v.'ith each bushel : his other engine at the 

 same mine, loaded 3*1 per square inch, lifted 25,505,239 pounds 

 per bushel: his engine at Wheal-Vor, loaded 15*2 per inch, 

 lifted 39,295,441 pounds: and his engine at Wheal-Unitv, 

 loaded 12-5 per inch of cylinder, lifted 20,154,555 pounds. 



The Wheal Chance engine during January, loaded 13"2, lifted 

 43,840,102 pounds per bushel, 



AGRICUL- 



