30 inch Speculum, with 12 powers and position micrometer,
and transit eye-pieces 1000 0 0
Prices will be forwarded for special arrangements in any of these
large sizes.
£ s. d.
Driving Clocks for 6 to 8 inch 35 0 0
〃 〃 12 〃 18 〃 40 0 0
〃 〃 20 〃 30 〃 50 0 0
These are fitted with governor, regulator, and self-adjusting break.
They are made of gun metal and steel, and every wheel is cut. They
drive with most excellent regularity, and are, when desired, made to
beat seconds on a bell. The whole is enclosed in a mahogany frame,
with glass panels.
Fig. 2 admits of equal completeness, &c., but the stand is not so
convenient for clock-power.
SILVERED GLASS EQUATORIAL TELESCOPES, very substantially and well
fitted as (Fig. 2). All these equatorials have revolving body.
£ s. d.
5-1/4 inch Speculum, from 4 to 6 feet focus, with 7 inch
hour circles, reading to 5 seconds of time, and
declination circle reading to 1 minute, 2 powers 30 0 0
6-1/2 inch Speculum, of from 5 to 6-1/2 feet focus,
10 inch rotating hour circle, reading to 5 seconds of
time, and declination circle to 1 minute of arc, with
3 powers--100 to 500 45 0 0
8-1/2 inch Speculum, as above, with 10 inch circles,
4 powers 70 0 0
10 inch Speculum, as above, with 10 inch circles,
5 powers 90 0 0
12-1/2 inch Speculum, as above, with 10 inch circles,
5 powers 120 0 0
The EDUCATIONAL REFLECTOR is a plain and very steady and
satisfactory instrument, mounted on (Fig. 2) stand, without circles,
has revolving body, and made so as to be portable.
£ s. d.
8-1/2 inch Speculum as above, with 3 powers 40 0 0
The POPULAR REFLECTOR (Fig 3), with Angle-Block stand, with
endless screw-motion to follow the stars with equatorial motion.
£ s. d.
5-1/4 inch Speculum, of from 4 to 6 feet focus,
with 2 powers 15 15 0
These are also made with rotating body.
Reflecting Telescope on Alt-azimuth Stand, fitted with silvered
glass Speculum, and provided with two eye-pieces.
£ s. d.
5-1/4 inch Speculum, 4 to 6 feet focus 19 10 0
6-1/2 〃 〃 5 〃 6-1/2 〃 25 0 0
8-1/2 〃 〃 〃 6-1/2 〃 33 10 0
10 〃 〃 〃 7 〃 50 0 0
12-1/2 〃 〃 〃 8 〃 70 10 0
Silvered-Glass Specula (_unmounted_).