1 46 Mr. Schroeter's new Observations 
In this reflector likewise , as well as in that of 7-feet, the south - 
ern horn appeared sensibly smaller than the northern. 
May 12th and 13 th, I perceived again traces of the twi- 
light of Venus; but the stormy state of the air rendered it too 
bad for such nice observations. 
May 1 6th, after sunset to S h 40', I had, for the third time, 
the pleasure of observing this crepuscular light of Venus's at- 
mosphere, with the 13-feet reflector. Although the circum- 
stances were not by far so favourable for such observations as 
when I discovered it in the year 1790, and the luminous ap- 
pearance therefore came to the eye sensibly weaker and more 
indistinct than at that time, yet all was confirmed ; and in this 
observation I thought it worth remarking, that the dim cre- 
puscular light seemed to extend sensibly further on the south- 
ern than on the northern horn, though this might easily be a 
deception. 
May 19th, after sunset, the light now coming to the eye 
sensibly clearer, I found the circumstance just noticed to be 
again the same, with 97 of the 7-feet Hersch. and 136 of the 
13-feet. 
Hitherto the circumstances had not been favourable enough 
for a repetition of the measurement, and therefore I was eager 
for a better observation. 
But May 20 th, Venus was covered with clouds. However, 
at length I succeeded in a measurement. 
May 21st, at S h 30 ',p.m. six days before the inferior con- 
junction, and consequently just the same time as in the year 
1790. Venus being rather too low for the 13-feet, and for 
the 7-feet Hersch. I employed the 7-feet Schr. ; and found 
the crepuscular light beautiful, and sufficiently distinct. It 
