, giving the glass surface the peculiar
appearance to which the above name has been given. The rapid cooling of
the glass may be facilitated with the aid of a stream of cold air, or
by continuously projecting a spray of cold water upon it. By protecting
certain portions of the glass surface from contact with the flux, with
the use of a template of any ornamental or other desired form, these
portions will retain their ordinary appearance, and will show the form
of the design very strongly outlined beside the crackled surface. In
this manner, letters, arabesque, and other patterns in white or colored
glass can be produced with great ease and with fine effect.
* * * * *
HOW MARBLES ARE MADE.
Marbles are named from the Latin word "_marmor_," by which similar
playthings were known to the boys of Rome, 2,000 years ago. Some marbles
are made of potter's clay and baked in an oven just as earthenware is
baked, but most of them are made of a hard kind of a stone found in
Saxony, Germany. Marbles are manufactured there in great numbers and
sent to all parts of the world, even to China, for the use of the
Chinese children.
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