152 Melcoiology. 



out nearly tlie same by both tables. From this 1 liatl a sus- 

 picion, th'at the error of the tables of Burckhardt in longitude is 

 less than in these two other elements, which I think has been so 

 far confirmed bv Mr. Evans's observations. 



I should be ^lad if some of your correspondents would give 

 vou, for publication, the diameter of the moon as measured on 

 the sun's disc. The apparent diameter, at the instant of greatest 

 observation for Greenwich, is 29' 3S-"9S by Burckhardt's tables, 

 and 29' 43 -"16 from those of Burg. 



I am, dear sir, your most obedient servant. 

 To Mr. Tilloch. George Innes. 



A REPLY TO MR. INNES. 



(See our last Volume, page 43G.) 

 Sir, — 1 am much obliged to your correspondent, Mr. Innes, 

 for suggesting the probability of an error in the time of my ob- 

 servation of the solar eclipse on the7th of Sejjtember last. I have 

 examined the minutes made on that day and the calculations, 

 and find I had properly applied the equation of time, but I had 

 copied the i educed Umejor Greenwich, instead of that for this 

 place. The lon(j;itude of this place being 2"" 39° west of Green- 

 wich, tliis time should be subtracted from the time before given, 

 and will stand thus : 



Mean tnne at Leighton ^ ^^^2 3 10 28. 

 T beg also to state, that the time was obtained from six alti- 

 tudes of the sun on the morning of the 7th of September, three 

 of upi^cr and three of lower limb giving the mean altitude 17" 

 6' 22" time by chron. 7'' 5'" 26°. 



Rarom. 29'S()^ from which I made the error of chrono- 

 Therm. 50' ^ meter 12'" 26-|^ 

 To Mr. TUloili. B. Be VAN. 



METEOROLOGY. 



Croom's Hill, Greenwicli, Dec. 31, 1820. 

 Sir, — I have the pleasure of iiandiug to you an account of 

 the cjuantitv of rain fallen, and the (juantity of evaporation that 

 has taken place at Greenwich in Kent, during the year 1820. 

 1 have subjoined the whole quantity for the last four years, and 

 vou will perceive that the register of the past year has been less 

 than any other, and very greatly less than that of 1819. — In the 

 midland counties inconvenience has been felt for the want of 

 rain, as the mills in many, and the canals in several instances 

 have stopped working for the want of water. 

 Ever, sir, yours. 

 To Mr. Tilloch. Henry Lavvson. 



