The above cut shows a driving clock for our standard 6 in. telescope.
We have constructed clocks for a number of larger telescopes among others the clock for the 24 in. Lowell Refractor.
ACCESSORIES TO TELESCOPES A101 TO A135.
| A140. Finder fitted to 3" telescope. Price | $12.00 |
| A141. Finder fitted to 3½" telescope. Price | $15.00 |
| A150. Positive Eye Pieces. (Ramsden), focus 6 mm. to 25 mm. Price | $4.50 |
| A151. Negative Eye Pieces. (Huygenian), focus 5 mm. to 25 mm. Price | $4.50 |
| A152. Diagonal Eye Piece. The prism of the eye piece has guaranteed optically plane surfaces and will not affect the definition of the telescope. Price | $12.00 |
| A153. Terrestrial Eye Piece, focus 25 mm. Price | $12.00 |
| A154. Sun Caps, to fit above eye pieces. Price | $1.50 |
The outside diameter of all our eye pieces is 1¼" excepting those used in our Micrometers.
A 201