the mean Denjity of the Earth. 691 
r ~ < i " \ ' r V f V , ,• , ' *;■" .v - 
A fynopjis of the horizontal and vertical angles that were 
obferved at the principal points in making the furvey 
about Schehallien. 
In the firft column are contained the names of the 
horizontal angles, the meafure of which, in degrees and 
minutes, are in the fecond column, and the vertical 
angles are in the third column, in which it is to be ob- 
ferved, that the letter denoting the cbje6t is placed before 
the degrees and minutes, and e or D after them, to fhew 
that they are in elevation or deprefiion refpedtively. 
The mark # placed to the meafure of any angle denotes 
that it is the mean of the two obfervations made with 
the inftrument turned different ways ; namely, after the 
firft obfervation, reverfing it to make the fecond. Alfo 
the mean height of the theodolite is put down to each 
ftation. In the vertical angles, the bottom of the objedl 
is underftood, unlefs where the top is mentioned below, 
and fometimes the height of the pole is added in feet 
and inches. 
4 Q 2 
At 
