210 G. H. Seyms—Relation of Franklinite to the Spinel Group. 
Art. XXVIIL—Five new Variables, and a new Planet, found 
at the Litchfield Observatory of Hamilton College ; by 0. H. F. 
ETERS. 
RECENTLY the variability has been ascertained by me of stars 
in the following positions: 
Right Ase. Decl. Max. Min. 
= m. 8. mag. 
10 16 82 +14° 42'7 10 @ 
ee See 2 | —19 53°0 6 10 
10. 0. 19 —21 8°9 10 © 
20. € 15 —22 24°0 11 @ 
21° O.. 82 —21 54°6 10 © 
The limits of magnitude given are gathered from only 
occasional notes taken during the later years. For fixing them 
more accurately, and also for determining the times of period: 
icity, more systematic and continuous watching would be 
required. 
he positions refer to the equinox of 1860, which is the epoch 
arts. 
Aug. 9, 1876. 10" 34™ 27°, 
a(165)==21 27™ 498, 5(165)= —10° 0’ 18”. 
The motion is nearly parallel to equator, perhaps slightly 
southward, 56° in right ascension. 
Art. XXIX.—On the Relation of Franklinite to the Spinel rer 
of Minerals; by Guorae H. Sryms. (Contributions 
the Sheffield Laboratory, No. XLI.) 
HE amount of iron in Franklinite, as shown by pie 
determinations that have been made in the Sheffield Fe ther 
tory, is subject to considerable variation. To determine wie 
to supplement the recent investigations upon its composition 
and relation - the Spinel group, hs the akjeot in making the 
yses. 
The first experiments were made on rfectly formed cry* 
tals, in a matrix of limestone, from Mite Hill. The analyses 
- gave results which may be best expressed as follows: 
