£ s.d.
35, 60, 90, 130, 180, 200each0150
320, 450 1 10
610 1 76
All fitted with Sunshades.
Improved Achromatic, Ramsden’s Construction.
£s.d.
90, 130 each1 00
189, 250 1100
320, 450 1126
610, 750 2 20
850 2 20
Kellner’s Construction.
£ s.d.
30, 58, and 80each1 50
Solar Eye-Pieces.
£ s.d.
Solar Diagonal, with true plane 1126
Barlow’s Lens 1 10
Day Erecting Eye-piece 1 50
Coloured Eye-piece cap for observing the Moon 0 40
Transit Eye-pieces, for use with Equatorials £1 1s. to2 20
Adjusting Piece 0 26

Good Instruments will be taken in exchange, and liberally allowed for.

GEORGE CALVER,

HILL HOUSE, WIDFORD,

CHELMSFORD, ESSEX.

LETTERS AND EXTRACTS FROM THE FOLLOWING GENTLEMEN.

From W. E. Parkinson, Esq.

11, Wellington Park Terrace, Belfast,

July 7th, 1876.