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Why is the sky blue?
Why is snow white?
~ Why is sugar sweet?
What is dry ice?
Where does the day begin?
What is television?
What are eyebrows for?
What holds the stars up?
THIS BOY has The Book of Knowledge in his home.
boy is always ready.
in the conversation of his elders.
\URIOSITY is the beginning of knowledge — your
children’s first and best teacher, so let them ask as many
questions as they like, and be sure they are answered cor-
rectly. The child who is made to feel that this questions are
trivial will presently stop asking, and will lose the precious
gift of interest. But — can you answer all their questions?
Why do the stars twinkle? Can you explain this, so simply
and clearly that a child can understand?
‘The Book of Knowledge is an almost inexhaustible mine
of information. Every topic of interest and value to grow-
ing minds is here explained. More than 15,000 pictures show
at a glance facts difficult to understand through the written
word alone and double the chances for remembering.
Angelo Patri calls The Book of Knowledge “the best refer-
ence work for children that I have ever seen.”
Mrs. E. M. Ritter of Massachusetts, mother of two boys,
FREE to Parents
~ This Beautiful Booklet...
~ “The Modern Magic Carpet”
"THE BOOK OF KNOWLEDGE
2 West 45th Street, New York, N.Y,
‘There are.......... children in my family, ages. ..... SE
You may mail me, without any charge or obligation whatever,
the beautiful booklet, “The Modern Magic Carpet,” taken from
The Book of Knowledge, The Children’s Encyclopedia.
Name A Ea EP NER RE, ERR PR,
% . .
— aeto— S— — s—, s—)
is Boy Knows
Do YOU Know?
Why do | dream?
Why can’t | see in the dark?
Why are raindrops round?
What makes an echo?
It is a constant delight to him :
every. day, and is turning his eager curiosity into worthwhile knowledge.
plain interestingly and correctly many of the familiar things he sees around him. His
teacher will tell you that when she wants a quick and intelligent response in class, this
He understands many subjects of current interest in the papers and
He has made a long start in the race for knowledge.
The Book of Knowledge is already in the homes of
more than 3,500,000 children. It has been trans-
lated into many foreiga languages, giving to chil-
dren ‘in almost every corner of the globe the es-
sential knowledge of the world. The easy, friendly
style and the arrangement of articles are two im-
portant features. Step by step the young learners go,
from the simplest faces to the more advanced, yet
so gradually that they never feel the steady up-
ward climb. Send for the Free Booklet,
He can ex-
he BOOK OF KNOWLEDGE
The Children’s Encyclopedia
Answers Every Question Your Child Can Ask
says: “The Book of Knowledge is a boon to the teacher and
a boost to the child.” 5
Gretchen Westervelt, librarian, writes: *I suspect The
Book of Knowledge of just a bit of magic. No child can
handle a volume without finding something of interest, some-
thing not too difficult . . . The Book of Knowledge is the
Aladdin’s lamp for them all.”
Lewis M. Terman, co-author of intelligence tests used in
schools, says: “A goodly portion of the gifted children I have
been studying seem to have been brought up on The Book
of Knowledge . . . its contents, ‘regardless of subject, are will-
ingly and eagerly read by the large majority of children who
are given the opportunity.”
Send for the beautiful free booklet of fascinating pages.
It will deli ght your child. No obligation, of course,
Wake Up Their Sleeping Talents!
Wake up your child’s sleeping talents! What would you
not do to give your boy or girl a happy and successful
career? The first essential is to provide a thorough and
practical education that will stand the test of life. The
day you put The Book of Knowledge in the home is a
red-letter day in your family. Watch your child dip into
its fascinating pages. Note the subjects to which he
returns again and again with mounting interest. There is
a signpost, pointing the way to work or profession in
which. success can be won.
zons broadened, and mental powers developed when The
Book of Knowledge is in the home.
There is no substitute for knowledge. It opens all
doors. It-enhances personality. It is the one tool that
will help your child to help himself in the grownup
years ahead. Send for “The Magic Carpet” — FREE.
Talents are discovered, hori-, -