26 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



permanency of that journal a matter of certainty. It gives 

 us, indeed, great pleasure to add that, according to a recent 

 editorial announcement of Mr. Hendricks, definite arrange- 

 ments have been made for its continuance for at least one, 

 and possibly several years. Analyst^ II., No. 12. 



ON THE SPECTEA OF THE NEBULA. 



Dr. T. Bredichin, Director of the Observatory of Moscoav, 

 has lately investigated the spectra of various nebulae, mostly 

 planetary. The following (the numbers being taken from Her- 

 schel's General Catalogue in the Philosophical Trwisactions 

 for 1864) have almost the same spectrum of three lines, viz., 

 G. C. 4964, 4628, 4234, 4447 (annular nebula in Lyra), 4390, 

 4510. Resrardino- the three bris^ht lines in these difterent 

 nebulae as identically the same, Bredichin deduces from his 

 measures what he calls the 7nea7i spectrura of planetary 

 nebulae of this class, and he finds it to consist of three lines, 

 A, B, C, of the following wave-lengths : 



A = 5003.91.2; B=49571.4; C=48593.1. 



A and B, as Bredichin remarks, are nearly coincident with 

 the strongest rays of iron (5005 and 4956.5) in the bluish- 

 green portion of the spectrum. 



The nebula 4244 gives a stellar spectrum ; the spectra 

 of G. C. 4532 (Dumb-bell), 4373, and 4572 are described. 

 Bredichin speaks of a star in the centre of the disk of 4373, 

 but it is worthy of note that neither Herschel nor Kaiser 

 (who examined this nebula in 1839) describe this star. This 

 deserves examination. 2 (r, Nov., 1875, 109. 



ON PHYSICAL OBSERVATIONS OF THE PLANET JUPITER. 



The physical changes that are seen to take place on the 

 planet Jupiter have of late years attracted an increasing 

 amount of attention by the possessors of large telescopes ; 

 and among these Bredichin, of Moscow, has published a series 

 of eighteen photolithographs of the planet as observed by 

 him in 1874. In making these he has employed a telescope of 

 nearly ten inches' aperture, with a magnifying power of 250. 

 He has distinguished six distinct regions, a and /being polar 

 regions, c the equatorial, h and d the tropical, and e the re- 

 gion lying between the north tropical and north polar. The 



