192 A CENTURY'S PROGRESS IN ASTRONOMY. 



observations of the revived Nova revealed the 

 nebular lines. By the end of 1894 the new 

 star had faded to the eleventh magnitude, and 

 early in 1901 was observed as a minute nebula. 



After 1892 several new stars appeared, and 

 were detected on photographic plates by Mrs 

 Fleming (born 1857), of Harvard Observatory. 

 The first of these, in the southern constellation 

 Norma, was discovered in 1893 by its peculiar 

 spectrum on a Draper spectrographic plate taken 

 at Harvard. But the new star rose only to the 

 seventh magnitude. Other new stars were dis- 

 covered in Carina (Argo) in 1895, in Cen- 

 taurus in 1895, in Sagittarius in 1898, and in 

 Aquila in 1900. Nova Sagittarii was, at its 

 brightest, fully equal to Nova Aurigae, and was 

 plainly visible to the naked eye, but was never 

 observed visually. 



A temporary star, appropriately designated 

 " the new star of the new century," blazed out 

 in Perseus on the night of February 21, 1901. 

 It was discovered independently by several ob- 

 servers : on February 21, by Borisiak, a student 

 at Kiev, in Russia ; on the following morning, 

 by Anderson in Edinburgh ; and on the next 

 evening, by Gore at Dublin, Nordvig in Den- 

 mark, Grimmler at Erlangen, and other ob- 

 servers. When first seen by Anderson, it was 



