40 
MR. BARLOW’S ACCOUNT OF THE CONSTRUCTION OF 
In e Bootis the small star is well separated from the larger, and its blue 
colour well marked with a power of 360. 
r, Coronoe Borealis is seen double with a power of 360 and 700 ; 52 Orionis, 
£ Orionis, and others of the same class, are also well defined with the same 
powers. 
Still, however, it must be admitted that the telescope is not so competent 
to the opening of the close stars, as it is powerful in bringing to light the 
more minute luminous points. 
Of the planets, I have only had an opportunity of trying the telescope on 
Venus, Saturn, and Mars; and the latter is too low to furnish a good test. Venus 
is beautifully white and well defined with a power of 120, but shows some 
colour with 360. Saturn with the 120 power is a very brilliant object, the 
double ring and belts being well and satisfactorily defined, and with the 360 
power it is still very fine. The moon also is remarkably beautiful, the edges 
and the shadows being well marked, while the quantity of light is such as to 
bring to view every minute distinction of figure and shade. 
Description of the Telescope Stand. 
A correct representation of the stand, with the telescope upon it within the 
building, is given in Plate III. The fixed base is a strong built oaken curb six 
feet in diameter and six inches broad, imbedded on a circular brick founda- 
tion : to this is screwed an interior fillet or ribband, projecting higher than the 
other part of the curb, and serving the double purpose of keeping the stand to 
its centre and of receiving graduations to degrees and quarters, thus forming 
an azimuth circle. The outer part of the curb is beveled to the centre, and 
on this run three cast-iron rollers made to the same bevel : by these means 
the principal azimuth motion of the instrument is effected. 
At the corners of the triangular base are three strong cast-iron sockets for 
receiving the ends of three oaken bars four inches square, which form the 
moveable base of the stand, the plate below each socket being a detached 
rusting, screw-bolted through the timber and upper side, admitting thereby 
of being screwed up and tightened, in case any shrinkage takes place in the 
wood. 
