< 5 *° ) 
'Experiments by the long Needle. 
Diftancesofthe 
Loadftone from 
the Needle in 
Inches. 
09 - 
12 - 
15 * 
l8 ■ 
21 * 
24 v 
27 • 
30 - 
39 - 
42 - 
45 — 
48 - 
Si - 
54 - 
57 - 
60 r_ ' 
The feveral 
Angles of the 
Needle at the 
feveral 
Diftances. 
D. I 
* 7 — 
81 
72 — ■ 
53 20 
35 00 
24 IP 
17 —50 
13 10 
10- — 10 
8 — 00 
6 — ?o 
i 
5 — *5 
4 — 
? — 3o 
3 — 00 
2 — 35 
2 — 15 
2—00 
The differences 
compared one 
with another, 
at the feveral 
Obfervations, 
in Minutes. 
345 
570 
“35 
1100 
660 
380 
280 
180 
13° 
90 
75 
6 5 
40 
30 
2 5 
20 
*5 
00 
3 ° 
45 
*5 
At greater Diftances, and even the more remote in 
thefe Tables, the Power of the Stone is fo weak, and 
the meafuring the Angles at all times exaftly fo difficult, 
that *tis well if we come fometimes within 10 or 20 
Minutes of Truth : The Corre&ion of which I (hall 
wholly leave to the Determination of fuch Gentlemen, 
whofe Province fuch an Experiment as this moft pecu- 
liarly belongs to. 
A 
