C *0} ] 
IX* A Contrivance to make the Poles of the 
‘Diurnal Motion in a Celeilial Globe pafs 
round the '•Poles of the Ecliptic. Invent e A 
by John Senex, K R. S. read at a Meet- 
ing of the Royal Society, May 4. 1738. 
H E Poles of the Diurnal Motion do not en- 
ter into the Globe, but are. affix'd at one End, 
to two Shoulders or Arms of Brafs, attheDiftance of 
2 3. Degrees and an half from the Poles of the Ecliptic. 
Thcfe. Shoulders at the other End are ftrongly faftned 
on ; to an Iron Axis, v/hich pafieth through the Poles of 
the Ecliptic, and is made to move round, but with a 
very ftiff Motion 5 fo that when it is adjufted to any 
Point of the Fcliptic, which you deftre. the Equator 
may interfeft, the Diurnal Motion of the Globe on 
its Axis will not be able to difturb it. 
When it is to be adjufted for any Time, paft or to> 
come, bring one of the brafen Shoulders under the 
Meridian, and holding it faft to the Meridian with one; 
Hand, turn the Globe fo about with the other, that the 
Point of the Ecliptic, which you would have the 
Equator to interfeft, may pafs under no Degrees of the 
brafen Meridian : Then holding a Pencil perpendicular 
to that Point, and turning the Globe about, it will 
defcribe the Equator as it was pofited at that Time 5 and 
transferring the Pencil to 23 Degrees and an half, and 
66 Degrees and an half on the brafen Meridian, the 
Tropics and Polar Circles will be deferibed for the 
fame Time. 
