VOL. LII.J FHILOSOPHICAL TRANSACTIONS. 571 



XLVL Observations of the same Transit made at Madrid. By Father Ant. 

 Ximenes. From the Latin, p. 25 1 . 

 By the latest observations, the latitude of Madrid is 40° 25 ', and difference 

 of time from Paris 24"^ 18 . He made his observations with a telescope of 24 

 feet, made by Mr. Geo. Adams, and a clock made by Ellicot; with which he 

 made a great number of observations on the appulses of Venus and the sun, to 

 the vertical and horizontal wires of the telescope. At the exit he also observed 

 the interior contact at 8*^ I'" 44 , and the exterior contact at 8*^ IQ"" 23^ He 

 had doubts of the exterior contact to 3 or 4 seconds, but of the interior none. 



XLVII. The same Transit observed at Tobolsk in Siberia. By M. Chappe. 



p. 254. 



Apparent time. 



End of the eclipse of the sun, June 2, 1761, at 18^ 1 1'" 4* 



Internal contact of Venus with the sun's limb at ingress, 5th June IQ O 28 



Internal contact at the egress, 6th June 49 20^ 



External contact at the egress 1 7 394- 



These observations were taken with a refracting telescope of I9 Paris feet focal 

 length, with an eye-glass of 3 inches focus. The least distance of the southern 

 limb of Venus from the nearest limb of the sun, was measured by a micrometer 

 fitted to a 1 0-foot telescope, and found to be = & 2", and the sun's diameter was 

 = 31' 37^^ 



XLFIII. Observation of the same Transit, made at Leyden. By John Lulojs, 

 Professor of Mathematics and Philosophy in that University. From the 

 Latin, p. 255. 



Being furnished with proper instruments, Mr. L. commenced at 3^ SO'" to 

 watch the approaching transit, but was prevented by clouds from seeing it, till 

 by an opening between them, about 4^ 10"^, he saw Venus on the sun's disc as a 

 black patch. He had 4 or 5 other prospects of the transit through thin clouds ; 

 and he sometimes thought he observed a kind of lucid corona around Venus, of 

 a breadth equal to i or -f of her diameter. At 8^ 26"™ 50^ true time, he ob- 

 served the interior contact: but clouds prevented his seeing the exterior. He 

 wondered that at the time of that contact, though they were then at an altitude 

 pretty free from refraction, the border of Venus appeared serrated: which may 

 render the time of it doubtful by 3 or 4 seconds. 



XLIX. The Case of a Patient, who voided a large Stone through the PerincBum 

 from the Urethra. By Dr. Frewen, of Rye in Sussex, p. 258. 

 Henry Taught of Hastings in Sussex, aged 76, a strong hale man, and natu- 



4d2 



