on the Planet Venus . 
*39 
6 b io ( , just the same. 
March 30 th, 6 b 45' p. m. with 160, both horns uncommonly 
sharp, and equally pointed. 
f 36', the same. No spot. Then followed rain and cloudy 
weather. 
April 2d, 6 b 50' p. m. with power 160 of the 7-feet Schr. it 
struck me with uncommon certainty and precision, after so many 
similar appearances of both horns, that the southern horn b,fig. 1 1, 
was remarkably slenderer in comparison with the northern, a ; 
and that in general the whole southern illuminated part, c, b, d, 
appeared considerably smaller than the northern, c ,- a, d. I tried 
this phase with 288 and 370, and found it to be assuredly so ; 
and with the same certainty I observed it also repeatedly con- 
firmed with the noble 13-feet reflector, till 8 o'clock. My at- 
tendant, who knew nothing of it, made the same remark, and 
particularly noticed the irregular form of the arch bounding the 
illumination, which, by entering in further from d to e, than 
from d to f formed a slenderer horn, as often happens with 
the moon ; and also in the same manner in its single parts, 
the crescent of Venus appeared uneven, like that of the moon, al- 
though not sharply so, but faintly and undefined. I did not 
now see the mountains of Venus, by their projection and sha- 
dow, as in the moon ; but the appearances above described 
must indisputably have been occasioned by mountainous ine- 
qualities. Very often have I perceived similar phases on the 
moon with my naked eye. 
It would be inexplicable, if different eyes, with different ex- 
cellent telescopes, and various magnifying powers, should have 
seen for an hour together such an appearance, with equal con- 
fidence, and yet the whole be nothing but a fallacy, misleading 
Ta 
