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and others, have produced many large re-
fractors.
Cooke, of York, made an object-glass,
25-inch diameter, for Newall, of Gateshead,
which has done splendid work at Cambridge.
We have the Washington 26-inch by Clark,
ˆ
the Vienna 27-inch by Grubb, the Nice 29A-
inch by Gautier, the Pulkowa 30-inch by
Clark. Then there was the sensation of
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