BIBLIOGRAPHY. 749 



Comets of 1890— CoutiniKd. 



[List of comets of l«!H).] Month. Not., 51 : 238. 1891. 



[List with elements. ] Astron. Jour., 10: 176. 1891. 

 Comets of 1891. 



Kkkttz (11.) Znsammeustelliuii; der (Jometen-Kr.schtsiuunjijen dcs .JahrcB 1891. 

 Vrtljschr. d. astron. Gesellsch., 27: 60-9, 1892. 



[List of comets of 1891.] Mouth. Not., 52 : 271-1. 1892. 



[List with elements.] Astron. Jour., 11: 168. 1892. 



Comets of 1892. 



Campbell (\V. W.) Comets of 1892 und their si>ectr:i. Pub. .\stron. Soc. 



Pacific, 4: 248-50. 1892. 

 Comets (Orbits of.) 



Kreutz (H.) Bericht iiber Cometen. Vrtljschr. d. astron. Cesellsch.. 26: :?06-8. 



1891. 

 SciHTLHOF (L.) Sur les grandes perturbations des eomctes ])eriodi(ines. I'.nll. 



astron., 8: 147, 191. 1891. 

 Weiss (E.) Berechnnntj einer Kometenbahn mit IJeriicksichtii-un^ von (ilied- 



ern hoherer Ordnung. .Sitzungsber. d. k. Akad. <1. Wessensch. Wien. math. 



natnrw. el. 100: 1132-50 (Al)th 2 a). 

 Coordinates (Transformation of). 



Fraxke (J. H.) Transformation rechtwinklig-si)hiiris(lier fgeodiitischer) 



Coordinaten anf neue Normalpnnkte. Astron. Nachr.. 126: 3."')3-8. 18i)l. 

 Neckkk (K.) Transformation sphiirischer Coordinaten. Astron. Nachr., 130: 



49-,54. 1892. 

 Corona. 



JJiGKLow (F. H.) Extension of the corona and the details of its structure. 



Obsry., 14: .50-2. 1891. 

 . Period of the rotation of the sun near the i>oles, as derived from the 



coronas of 1878 and 1879. Pub. Astron. Soc. Pacifie, 3: 201-16. 1891. 



. Law of the solar corona. Pub. Astron. Soc. Pacific, 3 : 34-9. 1891. 



CiiARRoi'PiN (C. M.) Coronal extension. Pub. Astron. Soc. Pacific, 3: 26-30. 1891. 

 Pritchett (H. 8.) Solar corona of .Ian., 1889. from the photogiai)hs. il. Pub. 



Astron. Soc. Pacific. 3: 15.5-62. 1891. 

 Pmx (I.) Electrical discharges through poor \-acua, and on corunoidal dis- 

 charges. Astron. and Astroi)li.ys., 11 : 483-96. 1892. 

 Schaki5Ei;lk (.1. M.) Soiiui physical phenomena involved in the mechauical 



theory of the corona. Pub. .\stron. Soc. Pacific. :>: 70-3. ISHl. 

 Cosmogony. 



B.vcKiiorsE (T. W.I Structure of the sidereal universe. 21 |i., 11 ]>\. Ito. 



Sunderland, 1891. Publns West Herndon House 01)sry.. 1. 

 Si.K ( T. .J. .7.) Origin of the stelhu systems. Sid. Mess., 10: 179-87. IWU. 

 Crowborough Observatory. 



Ixouerts (I.) Isaac Robert's new observatory on Crowhorougli Hill. Snss(\\ 

 [Eng.]. Month. Not., 51: 118. 1891. 



Defective illumination. 



.YndinCi (E.) Lichtvertheiluug anf einer uuvollstiindig l)eleu(htetcn I'laneten- 

 scheibe. Astron. Nachr., 129: 377-8S. 



Domes. 



CiiiUSTiE (W. H. M.) New dome to be erected at tin? K'oyal <)l)ser\atory, (ir(H'n- 

 wicii. il. Montli. Not.. 51 : 436-S. 1891. 



Double stars. 



]UuN-n.\M (S. W.) Compaiiion of Aldebaran. Month. Not.. 51: 311-3. 1891. 



. ("ompanions to l\egulus. .Mouth. Not., 51 : 4(iO. 1891. 



. Double-star discoveries and measures made in 1891 witli tlu- 36-in(;h 



ccjuatorial of the Lick observatory. Astron. Nachr., 130:257-342. 1892- 



