Tile machine-

Tiffany's Centennial, illustra-

tion and description of, 360-
363

making, process of, between 12th
and 15th centuries, 412, 413
roofs, great advantages of, for cool-
ness and safety, 332

purity of rain water from, 332
works, list of products of, 339
Tileries, London, process of, manufac-
ture in, 340

Tiles, American, 424–438

and bricks made in Maracaibo, 60
art of making, brought by the Cru-
saders from the East, 397, 398
as insulators, 332

Biblical tradition of, 327
bricks, etc., different forms of, 191,
192

decorative, made by J. G. Low,
Chelsea, Mass., 426

decorative, peculiar attractions,

428

encaustic, of the Middle Ages, dif-
ferent process from the present,

411

fire-proof floor, 290, 291

flat and round, in Roman architec-
ture, 329

flooring, process and machinery

for manufacturing, 438-453
for heating and ventilating uses,

288

found in the church at West Acre,

Norfolk, England, 413
from Pompeii and Italian cities,
gross designs upon, 427
general remarks on, 327-334
glazed, for art purposes, how clas-
sified, 405, 406

great improvement in the art since
the Philadelphia Centennial Ex-
position, 1876, 425

gutter, in use in England, 330
hollow, applied to fire-proofing,
iron, and other columns, 292,

293

hollow fire-proof, how made, 355
how glazed, 92

how shaped, after being hacked,
336

indestructible and economical, 334
introduced into the East by the
Crusaders, 397-399

Truth, an absolute necessity in terra-

cotta designs, 299

Tufa, volcanic material for light fire-
proof bricks, 62

Tuileries in Paris, origin of its name,

332

United States Government, test of
bricks required by, 101
materials in, for light bricks, 62
Pension Office at Washing-
ton, D. C., columns in, 286
tests of bricks for,
71, 72

Urbs pensilis in time of Pliny, 357
Utrecht, building bricks made at, 58

Van Twiller, Wouter, first brick build-
ings erected by, in this country, 29–30
Vasari, 403

Verulamium, old materials from, re-
used, 26

Virginia, good brick clay found in, 31
iron foundry and glass-house built
of bricks in 1622, 31

no attempt of the first colonists to
make bricks in, 31
quality of clay in, 45
Vitreous colors for ornamenting bricks
and tiles, 84-86

Vitrification in fire-bricks assisted by
tenacity of texture in the material,

255

Wages of brick-layers and carpenters
in New England, in 1630, 30

of brick-layers in Philadelphia, in
1705, 32

Wall of China, bricks employed in con-
struction of, 23

tiles, fixing, 437
Roman, how built, 26

"Watch," duration of, 151

Water smoke, changes in the, 145
Watson, Jno., of Camden, N. J., un-
successful experiments in making
zine, cause of, 242
Weather-boarding, tiles as a substitute
for, 330

Western Brick and Tile Co., works of,

181

Europe, no brick buildings now in
existence, built earlier than 11th
century, 27

Westminster Abbey, mosaic paving in,
46

Wetherill, Jno., final success in zine
manufacture by the use of good
retorts, 212, 243

Jno., of Bethlehem, Pa., causes of
his unsuccess, 242
Wheelbarrow folding, 137-139
Wheelbarrows, description of, 135–140
Woodbridge, N. J., clay at, 311
Wyatt, F. J., patent imitation of tesse-
lated pavements, 407

Parker & Co., pavements made
by, good quality of, 408

Xerxes, 395, 396

Zinc, failure of the Belgian method in
the United States, 242
failure of the Silesian plan at the
Lehigh Co.'s works, 242
imperfect retorts retarding its pro-
duction, 241

manufacture in the United States,

early attempts at, 242, 243
success of Dr. Isaac Lawson, 241,
242

when first made in the United
States, 242