what I intended to be a clear and satisfact..,-v rxplana- 

 tion of the facts. I juThaps scanaly ,x prrt^d that lu 

 would put his renewed failure to umierslaud the mattei 

 as a new basis for his eiitiivlv erruneiMis ideas on thi 

 subject. But that is his atTni-" not mine. 



I simply repeat or state tliat, 



1. The whole of the sm, is demnn.t imMv visible from 

 the moon at the time nf .-entiMJ eelipse, wlien the bound 

 dng horizon of (heeavtl, ,s elear ..f eL^uls. 



1 thus 



. ]v> 



ef tl,e 

 irsed. 



of t 



■efnily .lii-ee 



.ok a 



.■ with 



r he 



t that object, he will find that 

 tiir..ugii the right end or the wrong end (he could only 

 look at the sun through the right end wiien the sun'"t 

 light is much dimmed by fog or haze) the image seei 

 through the iustrument never looks brighter thaii tht 



tiected in such varyini^- .1 

 of the layer through uh 



lutely M::e 



]\lr. U'll 



.„,ih 



■Js of millions of 

 \-e were at the 

 i,at oeneil after 



■ accept ed explanation is 

 1 by Sir John Herschel," 

 H- the ruddy hue of the 



■ atmosphere." Sir John 





phere transmits; the gl 

 which are not transmitt 

 The lower strata of th 



NM ula is due to niys 

 1. til e^ed and dispersed. 

 -I ill, re in their normal 

 ided ill them or diffused 

 I lii'ou-li tlieiii I t !■ insiuit red, orange, and yellow rays more 

 fielv than jreeii. Mue. indigo, and violet rays. Hence 

 the sVitDi- -"un usuallvieoksruddy (this beyond question 

 is ul.at llersehel refers to when I- ; ^- ■ : il- ■ ^ ' 'v 

 hues of ^unset.). AVheu these r : . "_ 



clouds, or i-orks, or ic.-!bergs, or a- > : ' 



reilecting ur dispersing them tin;, hm.c t • -;!st iice 

 look red'. This ruddv r.He,-te,l or dls, . rsed luht is what 

 we see in twilight. But .f llersdiel leal la-arded this 

 twilight glow as the cause of the vu.hliiuss of the eclipsed 

 moon, he would not have spoken of deuble the deptli of 

 tint by reason of twice the depth ef atmosphere being 

 traversed ; for the more of this twilight colour in our air 



