144 Mr. Schroeter’s new Observations 
April 30 th, y h . Judging from the outer circle , I found the 
northern horn running out much longer than the southern. At 
the same time the southern appeared sensibly smaller : see 
fig. 17. I leave these remarkable phases to the judgment of 
the skilful, but to me they seem inexplicable, except from real 
shadows of an uneven mountainous surface. 
May 3 d, y h p. m. After much rainy weather I saw a similar 
phase ; for though I found both horns, at y h 30', without any 
sensible difference in their length, yet the northern was evi- 
dently broader than the southern. 
y b 45', still the same. 
8 b 25, the southern horn was still somewhat smaller, but 
only a little. 
9 h 45'- Venus being now near the horizon, and undulating 
in the vapours, I could perceive no difference in the breadth of 
the horns. 
May 6th , f 50' p. m. with a very distinct image I found 
both horns perfectly alike. 
May 8th, 8 h if p. m. the same, but the image indistinct 
after storms. No spots ; but they are not to be expected in 
these small phases. 
I now longed for fair weather, that I might carefully attend 
to the twilight from the atmosphere of Venus, which I disco- 
vered in 1790, as far as should be practicable in the present less 
favourable circumstances. 
May gth, 6 h 2 f p. m. I found, with full certainty, that though 
both horns were equally long, the southern at a, fig. 18, was 
scarcely half so broad as the northern at b ; and this was con- 
firmed by continued attention to the object. 
f 50', still nearly the same. 
