| £ | s. | d. | ||
| 35, 60, 90, 130, 180, 200 | each | 0 | 15 | 0 |
| 320, 450 | 1 | 1 | 0 | |
| 610 | 1 | 7 | 6 | |
| All fitted with Sunshades. | ||||
| Improved Achromatic, Ramsden’s Construction. | ||||
| £ | s. | d. | ||
| 90, 130 | each | 1 | 0 | 0 |
| 189, 250 | 1 | 10 | 0 | |
| 320, 450 | 1 | 12 | 6 | |
| 610, 750 | 2 | 2 | 0 | |
| 850 | 2 | 2 | 0 | |
| Kellner’s Construction. | ||||
| £ | s. | d. | ||
| 30, 58, and 80 | each | 1 | 5 | 0 |
| Solar Eye-Pieces. | ||||
| £ | s. | d. | ||
| Solar Diagonal, with true plane | 1 | 12 | 6 | |
| Barlow’s Lens | 1 | 1 | 0 | |
| Day Erecting Eye-piece | 1 | 5 | 0 | |
| Coloured Eye-piece cap for observing the Moon | 0 | 4 | 0 | |
| Transit Eye-pieces, for use with Equatorials | £1 1s. to | 2 | 2 | 0 |
| Adjusting Piece | 0 | 2 | 6 | |
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.