Iron-Bearing Rocks of tin Adirondacks. — Nason. 25 
The Laramie Group. — Bulletin Geol. Soc. of America, Vol. I. ~>'2i-5il 
(1890). 
1891. 
The Flora of the Great Falls Coal Field, Montana. — Amer. Jour. Sci.. 
iii, XLI, 191-201, PL XIV (1801 1. 
The Genus Sphenophyllum. — Jour. Cincinnati Soc. Xat. Hist.. XIII, 
pp. 21 2-2 17. 
Dr. Xewberry was also one of the editors of Johnson's Encyclopaedia, 
having charge of Geology and Paleontology. He wrote many articles 
on these subjects for its pages. 
Biographical sketches of Dr. Xewberry have been published in all the 
current biographical dictionaries and cyclopaedias. Portraits of him 
appear accompanying such sketches in "Men of Progress," 1870-71, p. 
317, and "Contemporary Biography of Xew York,'' Vol. V, 1887. p. 255. 
The Popular Science Monthly, Vol. IX, p. 491 (1876), contains a sketch 
with portrait, and in FairchikVs History of the Xew York Academy of 
Sciences, there is an excellent artotype. Since his death memorials 
have already appeared with portraits in the Engineering and Mining 
Journal, Dec. 17, 1892, p. 581, the Scientific American. Dec. 31, 1892, p. 
123, and the School of Mines Quarterly, Jan., 1893, with two steel por- 
traits; while others have been read before our principal scientific socie- 
ties, or are in preparation for them. The most complete and elaborate 
memorial is to be found in the Trans. X. Y. Acad. Sci., March, 1893, 
and is from the pen of H. L. Fairchild. 
NOTES ON SOME OF THE IRON-BEARING ROCKS 
OF THE ADIRONDACK MOUNTAINS. 
By Frank L. Nason, Jefferson City, Mo. 
The magnetite-bearing rocks of New Jersey and the exten- 
sion of the same belt through Orange and Rockland counties, 
Xew York, to the Hudson river was the especial field of work 
of the writer during his connection with the New Jersey geo- 
logical survey. Among the more tangible results of this work 
was, 1st, the identifying of persistent types of rock: I'd. the 
actual tracing of them through the states above named in 
practically continuous belts; and, 3d. tracing the relations of 
at least one of these types to the magnetite ores of the High- 
land range of New Jersey and New York. 
The magnetite ores of this belt are highly crystalline, they 
exert a powerful effect on a compass needle, and many of 
them possess a distinct polarity, being often rather strong 
magnets or Iodestones. They very rarely possess a distinct 
crystalline form. In fact, the writer knows of no crystals of 
