own to the lowest cent. We shall have to do it; and
it won't hurt us, either. On the contrary, it will be a good
lesson. If each of us would use the least possible material in the
home, the factory, and the office we should save an amazing amount in
a year."

"I think we ought to do it," affirmed Theo soberly.

"So do I," rejoined the elder man. "Many manufacturers have already
come to finding uses for stuff they previously considered waste. They
are using up their by-products, thereby not only enriching themselves
but giving to the world things that are needed. It is an interesting
and ingenious problem. If we were to employ the same principle
everywhere we should find it well worthy of our brain power. Now shall
we go back and hunt up Mr. Croyden, or have you still questions to
ask?"

"I have a thousand questions," laughed Theo, "but I don't think you'd
better stop now to answer them. Mother says I always do have
questions; she says no sooner am I through with one than I am ready
with another."

"So long as they are intelligent, thoughtful questions I am sure no
one minds answering them," Mr. Marwood replied. "How else are we to
learn? The man who is ashamed to ask questions and confess he does not
know is worth little in the world. When I spoke of questions, however,
I meant questions about china-making."

"Oh!" exclaimed Theo. "No, I don't think I have any more questions
about porcelain except to ask you how the glaze is put on the biscuit
ware."

"That certainly is an intelligent question, and one I shall be only
too happy to answer," Mr. Marwood said. "We could go down into the
dipping sheds if we had more time. But perhaps since there is not I
can tell you about them and it will do almost as well. To begin with,
these sheds have cement floors because the glaze, or slip, spatters
all about and dries upon them. It is therefore practically impossible
to keep wooden floors clean, and we do not wish our workmen to inhale
any more of the dried flint dust than is absolutely necessary."

"I remember hearing about that," Theo said.

"The glaze material is ground up while dry and very carefully sifted,"
went on Mr. Marwood. "Afterward it is mixed with water; colored, if a
tinted glaze is required; and then pumped into tanks where it is kept
well stirred. When ready the ware is dipped into this glaze and again
fired. This time, however, it is a more difficult matter to pack it
into the saggers since it must neith