Mathematical Inftruments . 
intention or defire of the perfons 
who propofe to be purchafers, from 
n 
130 guineas, to 
Smaller inftruments of this kind 
defigned to fnew only a few of the 
particular phenomena, are made at 
various prices, 
327 Ailronomical quadrants, 3 feet radi¬ 
us. - -—— 
328 Ditto, 2 feet radius, 
329 Ditto, 18 inches radius, 
130 Ditto, 12 inches radius. 
And all other aftronomical in¬ 
ftruments, as fe&ors for obferving 
angular diftances and differences in 
right afcention, equal altitude in¬ 
ftruments, and tranfit inftruments, 
&c. of various prices according 
to their ftze, &c. 
1500 o o 
130 
0 
0 
70 
0 
0 
5 ° 
0 
0 
3 i 
IO 
0 
Navigation Inftruments. 
ni T TADLEY 3 s quadrant. 2 
332 11 Ditto. 2 
4 Ditto. —•: 3 
334 Ditto. — — > 4 
135 Hadley’s fextant. .— 8 
136 Dr. Knight’s fleering compafs. 2 
1 37 *-• azimuth compafs. 5 
Thefe with all forts of fcales, 
rules, and all the inftruments ufed in 
experiments of natural philofophy, 
'for mechanicks, pneumatics, hy- 
droftatics, &c. are made, when or¬ 
dered, at moderate prices. 
o 
12 
3 
4 
8 
12 
15 
o 
6 
o 
o 
o 
6 
6 
To 
