336 Screntifie Intelligence. 
were oe and, with a high power, the angle of extinction - 
found to be from 7° to 9° for the microcline, and from 18° to 20 
the albite. I have never before met with a feldspar with the ald 
ments so crowded together and so fine. I hope you will yet be able 
to find, or that the proprietor will supply you with, some fragments 
of this ssigy Hs granite. An examination of ‘such specimens 
great interest on account of the enormous size of 
its deicieiase individuals. 
Ill. Botany. 
1. The Native Flowers and Ferns of the United States; by 
Tromas Meenan, illustrated by Chromo-lithographs. Series 2. 
Vols. I and II. Philadelphia : Chas. Robson & Co. 1880.—The 
last four parts of the issue of this series, now before us, if com- 
pared with the earlier show a great improvement in all respects. 
The drawings, and rel agents ite chromolithography, the excellent 
typography, and the superfluously s and high-calendered 
jada ie popular accounts of the plants, at a 
production of suc ae a copious and discursive letter press to meet 
the demands of rapid serial Liat aag is no light task, and it is 
not surprising if oversights now and then occur. Thus, under 
Wyethia Arizonica , which i is rématkably well-figured, an account 
this work find it true that “Asters are not more difficult of 
study than other ‘tant a p. 159), their experience will be differ- 
ent from ours. /eliopsis levis is not an “ Asteraceous plant.” As 
to the pei punt Sele it might be inferred that Lon fellow? s ref- 
erence to “ this delicate plant” preceded Gen. Alvord? ’s account of 
it, “‘ who seems to have been the first to direct scientific attention 
to the plant in 1848.” Gen. Alvord’s first account appeared in 
1842, and was communicated to the poet. Under Oxytropis Lam- 
berti (p. 191), why should it be said that Pursh seized on the 
labors of others and passed them off as his own? Pursh states 
