On the Cork Equatorial Telescope, ce. 349 
g-g. pair of bevel wheels and handle which give the slow motion 
in declination. 
hh. Is the clamping handle in declination. 
iz. Are the cords and lever for A clamping. 
k.k. The cords for the slow motion in A. 
(1. The lunar change wheels, for changing rate of clock from 
siderial to lunar, which wheels are geared and ungeared by 
m. the clutch. 
The handle for winding the M sector back after its run of two 
hours. 
ZR toothed sector. 
Handle for setting in ®M while reading. 
Lower circle, read through window in pillar P. 
Is the upper &€ circle, read from eye-end of telescope by 
= 
yA Os eS 
the telescopic reader, which is also available for reading both 
verniers of declination circle, by rotating with the handle at 
its side. 
T.T’. Two lamps—T illuminating both verniers of declination circle 
oo) 
—bright and dark fields of micrometric and position circle, 
and T” illuminating 7 the upper R circle. 
R: Clockwork inside of middle frame casting B. 
W. Pendulum of control apparatus. 
The following points being peculiar to the instrument, I desire 
to draw particular attention to— 
The eye-end and “breach-piece” arrangements—The eye- 
end is made to revolve and carry a position circle. The position 
circle instead of being metallic (in which case it requires a hand 
lamp) is of glass, with etched divisions illuminated from back by 
a beam of light from the lamp T. By pressing a key like a flute 
key on one side of body of tube of eye-end, the whole breach- 
piece is free to revolve quickly. On this key being let go it is 
instantly clamped, but can be finely set by a slow-motion screw 
at side. 
Reading of MR and declination circles by one single reader 
from eye-end of telescope. (Vide Figure 1.) 
