This he could cut through, leaving letters
of brilliant color and the general surface white, or _vice versa_.
Seal cutting is a very delicate and difficult art, old as the Pharaohs.
Protect the surface that is to be left, and the sand blast will cut out
the required design neatly and swiftly.
There is no known substance, not even corundum, hard enough to resist
the swift impact of myriads of little stones.
It will cut more granite into shape in an hour than a man can in a day.
Surely no one will be sorry to learn that General Tilghman sold part of
his patents, taken out in October, 1870, for $400,000, and receives the
untold benefits of the rest to this day. So much for thinking.
Nature gives thousands of hints. Some can take them; some can only
take the other thing. The hints are greatly preferred by nature and
man.
CREATIONS NOW IN PROGRESS
The forces of creation are yet in full play. Who can direct them?
Rewards greater than Tilghman's await the thinker. We are permitted
not only to think God's thoughts after him, but to do his works.
"Greater works than these that I do shall he do who believeth on me,"
says the Greatest Worker. Great profit incites to do the work noted
below.
Carbon as charcoal is worth about six cents a bushel; as plumbago, for
lead pencils or for the bicycle chain, it is worth more; as diamond it
has been sold for $500,000 for less than an ounce, and that was
regarded as less than half its value.
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