136 Astronomical Society. 



roads in the moon, has begun publishing a Journal, devoted to astro- 

 nomy and geography, under the title " Analecten fur Erd-und Kim- 

 mels Kunde." 



The first paper is a minute description of every part of a zenith 

 telescope, for the use of a Katachthonian observatory to be built six- 

 teen German (seventy-four English) miles below the surface of the 

 earth ! ! ! 



XXV. Proceedings of Learned Societies. 



ASTRONOMICAL SOCIETY. 



- . „ pROF. STRUVE communicated the result of his obser- 

 une . j~ vations and measurements of the apparent distance be- 

 tween the body and the ring of Saturn : from which it appears that he 

 is decidedly of opinion that the body of Saturn is not in the centre of 

 the ring. From a mean of 15 measurements, he makes the apparent 

 distance on the left side equal to 1 1"*272, and on the right side equal 

 to 1 1"'390 : the difference is 0"*215. The probable error of these mean 

 measurements he considers equal to 0"*024. M. Struve adds some 

 slight corrections to his former measurements of the diameters, &c. 

 of Jupiter, of Saturn, and of the Ring ; which he has deduced from a 

 more accurate determination of the value of his micrometer. 



The next communication was from Mr. Prinsep of Benares, giving 

 an account of two eclipses which he had observed at that place in 

 the course of the preceding year. The first was a solar eclipse on 

 April 26, 1827. The commencement was not observed ; but during 

 the course of the eclipse a number of micrometrical measurements 

 were taken by means of the five horizontal wires of a Troughton's 

 18-inch circle : and he states the end of the eclipse to have taken 

 place at 20 h 3 m 7 S ,5 mean time at Benares. Mr. Prinsep then adds, 

 u At the period marked as the end of the eclipse, the sun's disc was 

 clear of the moon : but, for 10 or 15 seconds later, I remarked, as it 

 were, a stretching of the sun's edge toward the point which the moon 

 had just quitted. This was apparently the effect of refraction by the 

 moon's atmosphere." The end of this eclipse was also observed by 

 Mr. Walter Ewer at Cawnpore, at 19 h 56 m 3 S ,5 mean time at that 

 place. The second eclipse, alluded to by Mr. Prinsep, was of the 

 Moon, on November 3, 1827. It was observed in the same manner 

 as the solar eclipse above mentioned. The following is the result of 

 his observations, stated in mean time : h m s 



The edge became dull at 8 42 



The edge invisible 8 44 18 



The edge of the same colour as the sky . . 8 45 30 



Decided shadow 8 46 1 



A bright spot becomes invisible 8 52 26 



Immersion of a small star 1 42 14,2 



Moon's transit 1st limb 1 1 45 48,2 



Do. do 2nd limb 11 47 57,1 



End of the eclipse 12 1 6 



Mr. Walter Ewer observed the beginning of this eclipse at Cawn- 

 pore, 8 h 35 m 23 8 mean solar time at that place : the difference of 



longitude 



