156 Mr. Schroeter's new Observations 
observation of Dr. Olbers is certainly not unimportant, and 
it will on occasion be further explained. 
If any astronomer shall think it worth the trouble to observe 
Venus , not barely now and then , at whatever time of the day it 
may be , but continually , with the same persevering zeal, and when 
the weather is favour able almost hourly, about the time of her great- 
est distance from the sun, I am convinced that he will certainly 
perceive the rare phaenomenon in question, just as well as I 
have done. If, contrary to all reasons which hitherto appear, I 
should hereafter be convinced that I was deceived, I would 
myself, willingly and impartially, bring the offering to truth ; 
and so much the more readily, as no indirect views have ever 
led me on, but I have been actuated solely by an irresistible 
impulse to observe ; and because I certainly shall never have 
reason to be ashamed of the observations I have laid before the 
world, which have always conducted me to new truths. 
II. Further Explanation and Correspondence of Computations 
of the Twilight , together with Remarks on the other Properties 
of the Atmosphere of Venus.* 
As the celebrated author of the paper so often mentioned, 
“ on the planet Venus,” though he confirmed my discovery 
of the twilight of Venus's atmosphere, yet represents the com- 
putation of it, p. 16 and 17, -f as not demonstrated , and positively 
as very inaccurate, which may, without any foundation, be in- 
jurious to the truth, it becomes my duty to give some explana- 
* Many of the explanations and remarks in this section come from Dr. Olbers of 
Bremen, who, at my request, kindly undertook not only to examine the old computation, 
but also to compare the calculations deducible from the new observations, 
f P. 214 and 215, Phil. Trans, for 1793. 
