I 1 Y < >1 11!! 189 



i-U NOW " tin- | 



degree of equality Thin enables us to nee the faintest 

 IM, even when they are only a 



n-iu.iv.-l i'n-m it 'Hi.- -.it. -Hit- i .u. \.iy M uly th- 



liminrit !,;, -cU that can be seen in th.- h M\ im; so 

 that t hoy cannot bear any considerable dim i nut ion of 

 rt \\iihamore I u mi n>us object. 

 U'cuinin^ ii. thni the spht-r 



illuiuination of our IH-W plum-t 1 limit. ! t 

 20", we may fully account i'-.i- th. !.. 

 i they cum \\itliin iU reach; foi 



1 lose it pr< 



view of a weak li-ht \tin-ui>hing a weaker, though 

 a commonplace now, received a very poetical inter- 

 pretiit i paper \ by Herachel three yean 



cased sen." il-i lity." li- *Ay0, " was such, 

 that if a star in^niui.i. came towards the 



field of view, I found it necessary to withdraw the eye 



* its entrance, in order not to injure the delicacy 

 ion iicijuir.'.l )>y ln.; continuance in the dark. 



rge stars, unless where none of t)i< 

 6th or 7th m.i_ >ul<l be had, has generally 



been in my >\Vf-|).s, .-vm with tip- l>< 



telescope. Aipl 1 r. m--ml- r. th.ii after a considci 

 weep with the 40- feet instrument, the appearanc 



announced itself, at a great distance, lik- the 

 dawn of the morning, and came on by degrees, in- 

 creasing in brightness, till this brilliant star at last 

 entered the Held of view of the telescope, with all the 



; of the rising sun, and forced me to take the 



:om that beautiful M-!.; To increase this sen- 



< eye he was on these occasionfl in the 





