79 
HALL 77. 
FICTILE AND REFRACTORY MATERIALS, 
PIGMENTS, ETC. 
Clay is the basis of most of the materials shown in this hall. 
Together with it however are associated sand, tripolite, feldspar, 
etc., for the various purposes for which it is used in the arts. 
Case 1. — Varieties of clay and their uses. Some of these 
are kaolin, the finer varieties of which are used for porcelain, the 
coarser for fire brick; modeling clay; brick clay; pipe clay; mixed 
with feldspar for glazing. 
Cases 2 and. 4.— Articles made from fire clay and capable of 
withstanding a high degree of heat. They include assayers cruci- 
bles, muffles, ladles, stove linings, etc. 
Platform 3 . — Varieties of stoneware presented by the 
Canton Stoneware Co., Canton, Ohio. 
Case 5. — Pottery and brick clays from foreign localities, in- 
cluding Brazil, Greece and New South Wales. Natural pigments 
used in coloring bricks and clays. 
Case 6 . — Varieties of fancy bricks and tiles. 
Case 7. — Clays from American localities. 
Platform 8. — Muffle and sewer pipe illustrating uses of clay. 
Case 9. — A collection illustrating native tripoli and its uses, 
presented by the American Tripoli Co., of Carthage, Mo. 
Case 10. — Ores and products of aluminium. Though alu- 
minium is the metal contained in common clay, efforts to extract 
it cheaply from this substance have so far failed. 
The ores from which it is obtained — bauxite and cryolite — 
are shown in the case, together with sheets of the metal and speci- 
mens of its alloys. 
Platform 11. — Varieties and uses of Portland cement. 
Case 12. — Natural Pigments used for paints and coloring 
matters. 
Platform 13. — Varieties of Terra Cotta. 
About the walls of the room are specimens of ornamental 
tiles and pottery illustrating uses of clay. 
