tpeter, Chilean, 22, 30, 36, 42
Schoop process, 272
Serpek process, 31
Silicon, 249, 253
Smell, sense of, 97, 98, 103, 109
Smith, Provost, 237, 245, 307
Smokeless powder, 15
Sodium, 148, 238, 247
Soil chemistry, 38, 39
Soy bean, 142, 211, 217, 306
Starch, 137, 184, 189, 190
Stassfort salts, 47, 49, 55
Stellites, 280, 308
Sugar, 164-180, 304
Sulfuric acid, 57

Tantalum, 282
Terpenes, 100, 154
Textile industry, 5, 112, 121, 300
Thermit, 256
Thermodynamics, Second law of, 145
Three periods of progress, 3
Tin plating, 271
Tilden, 146, 298
Titanium, 278, 308
TNT, 19, 21, 84, 299
Trinitrotoluol, 19, 21, 84, 299
Tropics, value of, 96, 156, 165, 196, 206, 213, 216
Tungsten, 257, 277, 281, 308

Uranium, 28

Vanadium, 277, 280, 308
Vanillin, 103
Violet perfume, 100
Viscose, 116
Vitamines, 211
Vulcanization, 161

Welding, 256
Welsbach burner, 287-289, 308
Wheat problem, 43, 299
Wood, distillation of, 126, 127
Wood pulp, 112, 120, 303

Ypres, Use of gases at, 221

Zinc plating, 271

_Once a Slosson Reader_

_Always a Slosson Fan_

JUST PUBLISHED

CHATS ON SCIENCE

By E.E. SLOSSON

Author of "Creative Chemistry," etc.

Dr. Slosson is nothing short of a prodigy. He is a triple-starred
scientist man who can bring down the highest flying scientific fact and
tame it so that any of us can live with it and sometimes even love it.
He can make a fairy tale out of coal-tar dyes and a laboratory into a
joyful playhouse while it continues functioning gloriously as a
laboratory. But to readers of "Creative Chemistry" it is wasting time to
talk about Dr. Slosson's style.

"Chats On Science," which has just been published, is made up of
eighty-five brief chapters or sections or periods, each complete in
itself, dealing with a gorgeous variety of subjects. They go from
Popover Stars to Soda Water, from How Old Is Disease to Einstein in
Words of One Syllable. The reader can begin anywhere, but when he begins
he will ultimately read the entire series. It is good science and good
reading. It contains some of the best writing Dr. Slosson has ever done.

The Boston Transcript says: "These 'Chats' are even more fascinating,
were that possible, than 'Creative Chemistry.' They are more marvelous
than the most marvelous of fairy tales ... Even an adequate review could
give little idea of the treasures of modern scientific kno