164 C. EK. Burron.—Physical Observations of Mars. 
correctness of the accompanying drawings, and may aid in deciding some points 
hitherto left in obscurity, I venture to give them in detail, arranging the points 
measured in order of longitude. 
In the following small tables, column 1 gives the ordinal number of the sketch 
on which the measures have been made; column 2, the separate results for 
longitude ; column 3, the separate results for the latitude of the spot named 
at the head of each table. At the foot of each column of results is given the 
mean deduced value of each element, usually the simple arithmetical mean. In 
some cases, where the sketches employed show the markings measured at very 
different parts of the disk, it was judged advisable to give different weights to the 
several results, the greatest weight being given to a determination made near the 
central meridian of the disk. South latitudes are considered positive. 
Dawes Forked Bay. Terby Sea. 
1 2° — 12° 6 95° 22° 
4 p 5 7 92 24 
3 6 —15 10 90 20 
e 0 11 93 28 
24 354 + 5 
ar eEeh Means, . 93 24 
Means, 3 = 15 ee 
Beer Bay. Spot possibly identical with the Terby Sea; 
1 95° — 3° drawn on December 24. 
2 21 +10 8 95° 0° 
3 2p Tk 9 91 24 
4 16 — 3 
y na aa’ Means, . 92 22 
6 18 (= 25) omittedin mean. ad 
Means, . 20 0 Bessel Lake. 
‘Lake’ at north end of ‘Canal’ proceeding 11 108° 23° 
from Beer Bay. 
1 97° 30° Dusky speck near the place of Bessel Lake. 
2 30 — 40 Query, identity ? 
== 10 116° 1B 
Means, . 28 — 35 
North-west angle of Christie Bay. (Bay of Funchal.) 
It 57° 0° 7 ILL ss? 33) 
3 68 182 10 118 36 
9) 49 5 11 113 36 
6 68 5 —= 
7 63 0 Means, 115 35 
10 (79) demittein 8 (near limb.) 
re eat Western bend of the ‘ Canal’ proceeding from 
Saat 6 Trouvelot Bay. Rather faint, especially 
Lake Schiaparelli. with the 6-inch. 
6 78° I 12 140° —10° 
i 74 24 13 174 —- 8 
10 87 25 14 133 0 
11 OU 18 20 156 5 
Means, 79 22 Means, 151 -— 3 
