The Solar Eclipse. 469 



I have also a single observation made at Ashridge Castle, the 

 Beat of the Earl of Bi idgew ater, which is about 604 feet above 

 the l^vel of the sea, us below. 



U December, 12'' 7'" Bar. 29 340. Ther. Att. 00^ Det. 51^ 

 And here it may not be amiss to state that a single ol)servation, 

 if correctly made at any stated time between the hours of S and 12 

 on the second Monday of the month, will be of use in deter- 

 mining the height of the station. 



It will also be an additional object of importance, when any 

 communication is made to the public on this subject, to state the 

 relative height of the instrument to that of the nearest navigable 

 river or canal. I am, dear sir, yours truly, 



B. Be VAN. 



The Solar Eclipse, observed hy the Rev. Mr. L. Evans, on the 

 TlhofSeplember IS20, the Latitude of his Observatory being 

 5 10 29' 7"-6 N. and Longitude 0' 'l6"-7 E. of the Royal 

 Observatory, Greenwich, in Time ; with a Table of the Right 

 Ascensions and Polar Distances of 46 principaljixed Stars. 



To Mr. Tilloch. 

 Dear Sir, — I have sent you my observations of the sun's 

 eclipse, on the 7th of September last, for insertion in your ex- 

 cellent Magazine, should you deem them deserving of such no- 

 tice. 



The time of the sun's passing the meridian of my observatory, 

 on that day, was at 11^5' 39"-7, sidereal time, by the transit 

 clock, which wtis fast 2' 16"-3, and its mean rate, for the pre- 

 ceding six days, +0"'6. I observed the beginning of the eclipse, 

 at l\^ 31' 16''-01, and its end, at 14'' 23' 36"-0S, sidereal time, 

 making allowance for the ga'inintr rate of the clock. These con- 

 verted to mean time will make the beginning of the eclipse, at 

 0*^ 23' 2"-S5, and its end, at 3'" 14' 5'4"-56, making a duration 

 of 2'' 5 I' 5l"-7l. The telescope, I made use of, was one of 

 the late Mr. Dollond's achromatic refractors, magnifying abouc 

 sixty, which was affixed to a polar axis of sniiicient stability. 

 I remain, dear sir, with great respect, 



Your obliged humble servant, 

 Woolwkh Common, Kent, L. EvANS, 



Nov. 27, 1820. 

 P. S. — I need not suggest to you, that every practical astro- 

 nomer, generally, makes a fresh list of the right ascensions and 

 polar distances of the fixed stars, at the commencement of every 

 new year, deduced from their annual variations ; the subjoined 

 catalogue will be considered as no trifling awpiisition to liiin, all 

 the ensuing year. 



The 



