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SYNOPTICAL TABLES.
Lord Rosse's Great Reflector, focal length, in feet, 54
Lord Rosse's Great Reflector— — — length of tube, in feet, 56
Lord Rosse's Great Reflector— — — diameter of tube, in feet, 7
Lord Rosse's Great Reflector.— — — weight of speculum, in tons, 3
Lord Rosse's Great Reflector.— — — expense, £12,000
Cambridge, U.S., refractor, diameter of object glass, in inches, 15.125
Cambridge, U.S., refractor,— — — length of tube, in feet, 23
Cambridge, U.S., refractor,— — — magnifying powers, 180-2000
Cambridge, U.S., refractor,— — — weight in tons, 3
Cambridge, U.S., refractor,— — — diameter of declination-circle, in inches, 26
Cambridge, U.S., refractor, diameter of— — — hour circle, 18
Cambridge, U.S., refractor,— — — cost, £4,000
Object-glass by Clarke, diameter, in inches, 18.5
Object-glass by Clarke, diameter,— — — contract price, £2237
Diameter of object-glass in process of execution by Cooke, in inches, 24

THE END

BALLANTYNE AND COMPANY, PRINTERS, EDINBURGH.

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