12 6 
Mr. Schroeter’s new Observations 
attention in the same manner to the same objects, with equal 
acuteness and perseverance. 
Having premised these remarks, I can now communicate 
exactly, and according to their connection, my new Observa- 
tions on the Planet Venus ; and that they may, in various 
points, be more easily and better compared with the observa- 
tions of my opponent, I will at present follow the order of my 
journal. 
New Observations, confirming the Rotation of Venus, her moun- 
tainous Inequalities, and the Twilight of her Atmosphere . 
Feb. 18, 1793, 5 h 50' p. m. As cloudy weather had conti- 
nued uncommonly long, and as the experience of many years 
had already shewn that little or nothing remarkable is to be 
expected, when considerably more than half of Venus is illumi- 
nated, I could not till this time proceed on the observations, the 
planet now approaching her greatest eastern elongation. With 
160 of the 7-feet Schraderi an telescope, I had, with the full 
aperture, such an extraordinary soft and clear image as I scarcely 
ever found in this planet. According to fig. 1. (Tab. XII.) 
both ends of the boundary of light appeared equally rounded, 
without any perceptible difference. There was, however, again, 
in the middle of the enlightened part, a kind of darker nebu- 
losity, not quite clearly to be distinguished, which seemed to 
consist of two very slight nebulous spots. The light decreased 
to extraordinary dimness toward the boundary of illumination. 
Feb. 2 6 , f 1 f p. m. An extremely remarkable observation. 
With 160, 288, and 370 magnifying power of the 7-feet Schr. 
