412 



ANNALS NEW YORK ACADEMY OF SCIENCES 



Table X. 



Date. 



Observer. 



P.-E. 



Weight. 



1880, May 9 



1880, July 15 



1881, Sept. 30 



1881, Nov. 10 



1882, March 14 

 1882, March 25 

 1882, March 28 

 1882, April 4 

 1882, April 6 

 1882, April 15 

 1882, April 15 

 1882, May 3 

 1882, May 15 

 1882, May 15 

 1882, May 22 

 1882, June 4 

 1882, July 2 

 1882, Nov. 20 

 1882, Nov. 25 

 1882, Nov. 25 

 1882, Nov. 30 

 1882, Nov. 30 

 1882, Nov. 30 

 1882, Dec. 2 

 1882, Dec. 4 

 1882, Dec. 5 



1882, Dec. 5 



1883, May 15 



1883, June 4 



1884, March 17 



1885, Jan. 7 

 1885, Jan. 16 



Ambronn 



Ambronn 



Franz 



Schur 



Kobold 



Peter 



dialler 



Kobold 



Marcuse 



Kiistner 



Kempf 



Deichmiiller 



Hart wig 



Schur 



Franz 



Wislicenus 



Bauschinger 



Franz 



Kiistner 



Kobold 



Deichmiiller 



Miiller 



Auwers 



Wislicenus 



Peter 



Kempf 



Hart wig 



Wislicenus 



Hart wig 



Marcuse 



Kobold 



Battermann 



+ 0".19 

 H-0".08 

 —€".51 

 + 0".22 

 + 0".28 

 + 0".06 

 + 0".37 

 — 0".05 

 + 0".07 

 .00 

 + 0''.09 

 — 0".04 

 + 0".09 

 +0".13 

 + 0".06 

 + 0".02 

 — 0".05 

 — 0".06 

 + 0".13 

 — 0".01 

 — 0".30 

 — 0".34 

 — 0".01 

 — 0".28 

 + 0".15 

 + 0".32 

 + 0".30 

 — 0".21 

 — 0".02 

 + 0".28 

 + 0".14 

 — 0".48 



1.1 

 4.0 

 0.3 

 2.8 

 0.5 

 5.0 

 0.5 

 2.8 

 0.7 

 0.4 

 1.7 

 4.0 

 6.2 

 4.0 

 0.5 

 4.0 

 1.7 

 1.0 

 1.3 

 1.7 

 0.1 

 0.2 

 1.7 

 0.3 

 0.5 

 0.6 

 0.7 

 6.2 

 2.8 

 0.3 

 0.3 

 0.3 



An inspection of these results will again show a change in the difference 

 between the polar and equatorial diameters. This change is not at once 

 apparent, for the relative weights of the separate determinations in this 

 series differ greatly, the largest being 6.2, the smallest 0.1. Some of the 

 determinations of small weight differ considerably from adjacent and better 

 observations, and these poor values tend to conceal the progressive change 



the ratio between the diameters. This change, however, is clearly 



m 



brought out when the observations are divided into groups and the weighted 



