400 Mr. Greatorex’s observations on the heights 
400 yards down. 7I1. 15m. 
inches. 
Bar. below - - 29.980. Ther. 55®. 
Do. above ... 28.310. Do. 47®. yds. 
Measured height - - - 526. 
By Dr. Maskelyne - - 513.3128 
error — 12.6872 
By Dr. Hutton - - error — 12.84 
Bar. below 
Do. above 
400 yards down. Sept. 6th, 1817. ioh. 15m. 
29.890. Ther. 59°. 
- - 28.240. Do. 54°. 
Measured height 
By Dr. Maskelyne 
A. M. 
yds. 
526. 
S*7-897S3 
By Dr. Hutton 
error — 
error — 
00 00 
On ~ 
O 
Bar. below 
Do. above 
450 yards down. 1 lh. 5m. 
- 29.900. Ther. 59°. 
28.396. Do. 540. 
Measured height 
By Dr. Maskelyne 
yds. 
- 476. 
470.2667 
By Dr. Hutton 
error — 5.7333 
error — 6.2514 
Bar. below 
Do. above 
500 yards down. 1 ih. 54m. 
29.900. Ther. 6i°. 
• 28.564 Do. 56°. 
Measured height 
By Maskelyne 
yds. 
426. 
4*7-8833 
By Dr. Hutton 
error - 
error - 
— 8.1167 
- 8.65 
Bar. below 
Do. above 
550 yards down. i2h. 24m. 
- - 29.905. Ther. 610. 
28.730. Do. 56°. 
Measured height 
By Dr. Maskelyne 
- 
yds. 
376. 
365.8427 
By Dr. Hutton 
error 
error 
— 10.1573 
— 10.6186 
Bar. below 
Do. above 
600 yards down. i2h. 53m. 
29.908. Ther. 6i°. 
28.866. Do. 56®. 
Measured height 
By Dr. Maskelyne 
yds. 
326. 
323.098758 
error — 2.901242 
By Dr. Hutton - error — . 3.326 
