76 Sir George Shuckburgh's Account 
in part at IK, and the other wholly hid behind EF, are 
firmly fixed, at their upper ends, to a circle of bell metal, 
B D F H, and, at their lower end, to an inverted truncated 
hollow cone* LLL, of brass, in height 2 feet, and in diameter 
at its base AG, 1 foot 9 inches. The cross pieces or tubes 
P, P, as likewise 0 , 0 , and 0 , 0 , serve to connect the co- 
lumns more strongly together, and prevent their bending. 
These several parts constitute the principal axis of the instru- 
ment, the lower end of which terminates in a steel point or 
cone, resting in a hollow conoid of bell metal, in such man- 
ner that the apex of the former does not reach to the bottom 
of the latter, but the place of bearing, and of friction, is (it 
may be) about two-tenths of an inch from the extremity of 
the cone ; the other end of this axis finishes in a cylindrical 
pivot N, of about 1^ inch long, and 1 inch in diameter, turn- 
ing in a Y of bell metal. The entire length of this axis is 
8 feet 4 inches, the lower end being supported by an iron 
frame 3, 4, 5, 6, 7, 8, which is firmly fixed, below the floor, 
into brick work, and, by means of two iron bars, one of which 
is seen at 28, and the other on the opposite side, not visible 
in the drawing, is kept secure from any motion eastward or 
westward ; the lower part of this frame, to about one foot 
high, is inclosed by a mahogany box, or case, 9, 10, the top 
of which is intirely covered up, and serves as a die or base to 
this end of the instrument. The other extremity of this long 
* Upon this cone are inscribed the following words . — “ Hocce Panorganon Ura- 
“ nometricum a Jesse Ramsden, Londinensi Optico celeberrimo, et omnibus id 
“ genus artificum longe anteponendo, excogitatum, decern post annos nunc tandem 
“ absolutum, Georgius Shuckbursh Baronettus, in testimonium amoris sui erga 
“ res astronomicas, et ad easdem promovendas, fieri curavit, anno 1791.” 
