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OBSERVATIONS ON HOY, I774. 
Month. 
Hour. 
Barome- 
ter. 
'1 hermo- 
metcr. 
Weather. 
Circumftances. 
1774- 
June 1 1. 
0 ii; 
28,63 
59 
Clear. 
On the top of the hill. 
0 30 
28,60 
561- 
Foggy. 
Ditto. 
4 15 
30,22 
^3 
Clear. 
At low water mark. 
Hoy Is a remarkable high hill near Stromncfs, in the Orkneys, and is placed 
by Mr. MACKENZIE in lat. 58° 58' North, and long. 3° 30' Weft from London. 
The two firft obfervations were made on the higheft part of tlie hill. Soon after 
the firft, a fog was feen below ariftng from the water, at-length it reached the 
fummit of the hill ; the air feemed very raw and cold to the touch, and the ip- 
llruments fliewed as in the fecond obfervation. The barometer continued at 
28,60 inches after the fog was gone off, but the thermometer rofe two or three 
degrees. The laft obfervation was made at low water mark, about half a 
mile from the bottom of the hill, thomas hutchins. 
“ The height of Hoy alove low-water mark^ according to thefe obfervations Jhould 
** be 249,93 fathoms^ or as near as may be 500 yards^ neglecting the correction for 
the difference that may be fuppofed in the temperature of the quickftlver at the two 
**JiationS) the quantity of which is uncertain^ s. horsley. 
XV. A 
