I'KOGlvl.SS OK ASTJv'ONO.MV F<»K' ls<il AX1» l,S!f_'. 711 



the fju'iila', tlic l;ilt*'r hriii};- depicted, not iiicicly wlicii iicjir I Ik- liial) 

 of the sun. but wherever they occur. e\ en in the \ery center ot the 

 disc. In this manner it has ])een discovered tliat iiu-uhe, invisihh' to 

 the eye frequently float above the s])ots, and one series of i)lioto,<irai>hs 

 in i)articnlar, show how, on duly 15, a luminous ontl>urst formed, 

 spread. conii)letely hid a lar.iic ^rouj) of spots, and i)asscd away, all in 

 a few minutes of time. 



The douhlv reversal of the 11 and Klines from faculae, a ]»henomen<)n 

 shown upon ]»hoto^raphs taken at Kenwood. Paris, and Stonyhurst, is 

 a discovery of special interest as bearing ii])on the interpretation of the 

 enianiatical spectrum of Nora AvrUjw. and Prof, Hale has su])i)lemented 

 this discovery by obtaining- a similar result -witli an integrating sjjec- 

 troscope, the sun being treated as a star would be, its light as a whole, 

 and not only from special regions of the disc, being subjected to exam- 

 ination. 



M. Deslandres lias l»een making further exi)erimenTs ujton photo- 

 graphing the corona without an eclipse. The ])rinciple upon which he 

 ])roceeds is to obtain i)hotographs of the sun from light of limited 

 refrangibility, not by using eoloied media or stained plates, but by 

 means of two ])risms, the second of which is arrange<l so as to reconi- 

 pose the light dispersed by the first. i>ut only ceitain rays from the 

 first prism are allow<'d to fall on the second: the resulting image of the 

 sun is, theieforc, confine<l to those rays which can be sch'cted at pleas- 

 ure. M. Deslandres" pnr])ose is, therefore, to find out foi' what rays 

 the corona has the gientest l)rightness as com])ared with that oi" the 

 sun, and to photograph the sun and its surroundings by theii' aid alone. 

 (.SVr urolith. Not.. r>2:2«»L': r):',:L>77. ) 



KCLII'SKS. 



A'f7//;.sr of iJic jiiooii, /sW^. J(tiuit(rj/ ;J8. — In numl)er 2','> of the Publica- 

 tions of the Asti-ononiical Society of the Pacific is an unusually satis- 

 factory drawing by Prof, ^\'ein<'k. showing the delicate shades of color 

 exhibited !•>" the eclipsed moon. 



Edipsc of the sun. is.s!), Jfoinory I. — Piof. PiitchetPs rci)oi-t of the 

 Washington Fniversity i)arty, which \\as stationed at N(»rm.in, Cal., is 

 illustrated by an excellent iirtotype. a conii)osite reproduced by hand 

 from foui- negatives. The e\ idence giv<'n l)y these jjliotographs upon 

 the stiiicture of the corona is thus summarized '-The marked sti-uctural 

 features of the corona ai-e (a) the so-<-alled hlanu'nts. and (/>) the sticam 

 ers extending ;ip]no\imalely in the direction of flic ecliptic. I'iu' tihi 

 ments extend o\er a region of 2<> degrees or more on e;icli side of the 

 ])olcs. They are straight lines of light ari'ang«'d somewlmt like the 

 si)inesofa fan. ;ind are not nidial. I'hedark spaces I)ef ween t hem ar<^ 

 not entirely free of coronal matter. i)nt can Ui- traced in some cases to 

 Avithin a short distance of the suiTs lindi. I'hc bi'oad and strongly 

 marked equatorial belt stretches directly across this mass of filaments, 



