I. PROGRESS IN 1*7. 







. Crookes. en r*. arc*... 





\ i l*i:m,i;i xx i s i >; : 





hr Sun f . ratmm, .. . MM ' il --> 



!... 



' ; - - 



M!! U- made 

 till taki- }!.. 





ihaltcr*. of < nk 



f tin- liuhl 

 !i< ll. ' 



!i photograph* taken at 



ormotia di 



It was dis- 

 h Hie tele- 



ible. on a mile of 

 our |>lani-l f< 

 subtended an ancle 



seondofnn at (hr 



j I . , 

 ' the prominetttn. which emu 



..,;. .- . 



that they belong to the 



fern* that can throw 

 ance H.0UO tail 

 from in- earth i* in- 



. 



nt th.- tnith .-f thr \Vil~.maii h)|.Mh.-M. :hl 

 rwi* .1. 



i measuring a large number of lines to the pbo- 

 solar spectrum, and has found that 

 e i* a difference of M-veral day* in the rotation 

 od* of the outer and inner portions of thr 

 osphere. the period increasing as the photo- 

 re is approached. He is now engaged upon the 

 at the measur. result 



i h tfrvat interest, a* be has perhaps 

 rtant ili*..\. TV in twilar 

 it ion of Stellar v 



..granner. afford. I. 



TW objects notably those 



in Piscea, Ursa Aajor. and Cane* Venatfci-asTord 

 abundant proof when compared with star clast/en 

 air The photographs show the nebu- 



lous matter broken up into tar and starlit* looi 

 'AT* are well defined, but the 

 iilou* margin*, as have those 



an ini| 



brtahtMei 

 wUehthei 



differ* but litUe from the 



reimmetwd. He MJ that e^try spiral 

 ai a rtelUr noSev 



mr* notd i> taM MD| ritj, UMii 

 nebulous cooTolutkxw and involved fCara are T- 

 metHrally arranged, and thb ia rtrong < 

 ,000milea that Owe* feature, are the rvevlt of known 



Miiuim magnitude, an 



nd wh.-n it wa* at half 

 gratjtast smi fisiiiMiitioi btgam, r. *..-.-. ^ .'.. . 



trail of spots rmrmnlinc a long train of < ar* 



' a|>|M-ar. 



two n^a- 

 >. a(T..r.|nu' a 



'itportuni? ' after al 



pots an> t ..n* instead of depressions ac- 



v. Astronomers are now 



hat the latter, whirh fr on* 



hundred ai v years ha.* held !>way. must be 



i* adurk 



Nurr-'ii!:.!.-.! lv a luminous atmoS|>bere (the 

 sphere), and that the |'l5 an' m 

 preesiopi. opening t< lark \*\* 



the penumbra is the sloping sides of 

 tlu> hole, hundr.iN if not thousand* of miles in 

 ii. i-th. The theory appeared so reasonable, and 

 VOL. xxxvii. A 4 



rider* that coUisfcae between solUTooitoor 



of M ton , r . ndsV . nj la .1- ) brthtv rH - 



'. -;.-.-. , N - -, \ .r ^, 



and .Yen* Andromeda and many other temporary 

 Man* are evidences of eoUWons. Photography. 

 fora, shows os nebubr in all rtagea 



nebula in Orion, through spiral nebula*, to cluster* 



CflfWtlal S|Hx-trwiropy.-S|^trosropic analy- 



"iinmou* heavenly bodies 



.ue* with nnabatd enthtiMa.m. Someobser- 



tea make it a special and exclusive study. 



/eta ftippi* prrvrnts an abnormal spectrum, giv. 



ing. in a. : he tuntal h> .!nppn line*, a 



ond serien of rhythmical line*. Sme of t* 



be seen ii 



some being blight and other* dark. 



There IMS been a suspicion that helium is a mix- 



vo elementary gases, as by a processor 



diffusion it 19 possible two get to gases of widdy 



