In May 1895 Howard, with the workmen, opened the kiln. The mold was
loose, so the pegs had sheared as expected. When the sand was removed
the disc was found to be whole. A close inspection revealed no obvious
faults. The disc was gently carried to an inspection room and Dr. Peate
was immediately sent for. He arrived, examined the disc for a moment,
then said, “Give me a hammer.” Before anyone could move he seized a
nearby hatchet and knocked off the sprue, or tail left as the pot was
removed from the mold. The onlookers feared the lens would “explode,” as
predicted by its detractors, but the only result was the removal of the
tail, as Dr. Peate expected.[35]
The _Budget_ was still saying it couldn’t be done. Commenting on a May
1, 1895, announcement of the removal of the disc from the kiln, the
paper seized on the fact that the disc was still warm to predict that it
would be shattered before Peate could examine it, and reiterated its low
opinion of Standard Plate. By the time this issue was in the hands of its
readers however, the disc had been inspected and approved by Peate.
Newspapers in Pittsburgh and elsewhere carried the news of the great
American disc. The embarrassed _Budget_ replied that it was not talking
about the mere casting of the disc but the completion of the mirror. It
feigned surprise that this was all that was to be done in Butler. Even as
late as May 24, 1895, the _Butler Democratic Herald_ was still defending
its town. It concluded an editorial on the issue thus:
… we have a feeling he [The _Budget_] has set his foot in it
when he goes to poke fun at the Standard about casting the
biggest mold on earth, and the end of it may be a repetition of
the old saw “he who laughs last laughs best.”
A week before this, however, the success of this casting had been made
more or less official by an announcement to that effect in the May 17,
1895, issue of _Science_, a publication of the American Association
for the Advancement of Science and probably the most highly regarded
scientific paper of the time.
[Illustration: FIGURE 14.—Surfacing machine used by Peate. (From Preston,
fig. 4.)]
On June 1, 1895, Standard Plate rendered Peate an invoice, not for
$1600, but for $450. Evidently their work was done at cost. The disc was
now removed to Greenville where Dr. Peate had erected a shop to grind,
polish, and figure it. As the disc was slightly out of round the first
operation was to make it perfectly circular. Peate did this roughly
by spalling off pieces of the edge with his bricklayer’s hammer. The
final rounding was done with the aid of the iron hoops that had made the
mold. Dr. Peate fed steel shot between the edge of the disc and the iron
semicircles. He rotated the disc on the turntable and thus rounded it off.
Public-domain text, read in full here on John Shaqi.
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