£ s. d. Solar Diagonal, with true plane 1 12 6 Dawes’ Solar Eye-piece 8 0 0 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