352 The American Geologist. May, 1894 
Fair was that in the Swedish building by A. R. Anderssen, of 
Upsala. These sections were remarkable for their ex- 
treme thinness, perfect evenness, and in many cases for their 
great size. Some of the sections of the orbicular granites from 
Slattmossa and Kortfors showed a perfection of workmanship 
rarely equalled. 
Systematic rock collections were exhibited by Ward and 
Krantz. A quite general collection was also shown by the U. 
S. Geological Survey, and more special ones by the state sur- 
veys of Minnesota. Missouri, New Jersey and North Carolina. 
Maine and Massachusetts, though without geological surveys, 
also displayed suites of their rocks. The government surveys 
of Canada, Japan and Sweden likewise showed extensive pe- 
trographical collections, accompanied by excellent catalogues. 
The New York Mineralogical Club showed a set of the rocks 
found on New York island. 
Among exhibits of ornamental stones perhaps the most 
novel and noteworthy were those of the New Pedrara onyx 
from Lower California, and of the rose garnet rock from Xa- 
lostoc, Prov. of Morelos, Mexico. The latter, which is an ag- 
gregate of white wollastonite, yellow vesuvianite and rose 
colored grossular, seems to be the product of contact meta- 
morphism in a limestone, analogous to the well known occur- 
rences of the Fassa Thai and the Banat. It is now being- 
studied by Dr. A. C. Grill. 
Other notable decorative stones were the Arizona silicified 
trees and the Sioux jasper (quartzite) from South Dakota 
exhibited by the Drake Polishing Company. Ward also dis- 
played a fine collection of 350 polished slabs of marbles, ser- 
pentines, and other decorative stones. 
The great slabs of polished granite, porphyry and other 
ornamental stones from Elfdalen and other localities in 
Sweden, placed just outside the Swedish government building, 
well deserve mention, as well on account of their size as their 
beauty. A beautiful ornamental stone from Langesundfjord 
in Norway, displayed in the Manufactures building, seems 
destined to become popular on account of the fine iridescence 
of its feldspar. This rock is well known to geologists as 
BrOgger's laurvikite. 
Of the great number of building stone exhibits scattered 
through the grounds no account can be taken here. 
