4 1/2 inch refracting telescope, signed Jas. Parkes & Son, Birmingham, circa 1860. The telescope has a 60 1/2 inch brass tube which reduces in diameter to a 6 1/2 inch tube which houses the rack and pinion focusing knob. The telescope tube is attached to the mount by a pair of removable brass circular collars. The telescope retains its original brass lens cap which has an applied brass knob or grip. There are two (2) additional telescoping brass tubes, the last of which houses the eye piece with a lend appoxamately 50 power and shows an upright image. The telescope has a sophisticated equatorial mount. There is a silver scale for both horizontal and vertical scales with an eye piece magnifier for each. The telescope retains its original 20 inch spotting scope which mounts to the rear of the main tube. The telescope has gear drives for fine adjustment of horizontal and vertical movements. The vertical movement is adjusted by turning a brass and wood wand. The horizontal movement can be adjusted by turning a wand or can be automatically adjusted via the clock movement. The mount has brass spirit levels for both vertical and horizontal levels. The telescope has a 4 1/2 inch objective lenses. The telescope is mounted on a two part cast iron monopod. The lower section has a circular base with an eighteen (18) inch diameter with a thickness of 1 1/2 inches. This heavy base can be adjusted for level by turning iron adjusting knobs mounted on the top surface of the plate. The upper section of the base fastens to the lower by three (3) set screws. The upper section of the base has sixteen (16) decorative flutes running vertically. On the back surface of the mount is an iron shelf which supports a brass clock with brass gears and winding crank. The left exterior of the clock has two (2) drive gears similar to the gear on the horizontal and vertical movements of the telescope that transfer the clock movement to the telescope. The clock is weight driven and retains its original brass wrapped weight and brass pulley. (I-260)
Condition: The telescope and brass parts from the mount and clock retain the original lacquer finish. The black painted surfaces on the mount and monopod are untouched. The wood wand has been replaced, the scale magnifiers have been replaced and the terrestrial lens has been adapted for use with this telescope. The clock work mechanism has been overhauled and the cable replaced. Dimensions: Length collapsed (without eye piece) 67 3/4 inches; Height (when parallel to the floor) 70 inches;
Note: There is a similar telescope by Parkes on view at the Museum of Scotland in Edinburgh.