214 I. P. Kocu. 
which the survey has taken place. An example of such a regulation 
of the angles is given below. 
The object of the computation of the base net was the best 
possible determination of the sides of the triangle HI—IX—XI In 
order to suffer the smallest possible loss of accuracy, the computation 
was carried on through the triangles which had the most favourable 
form (i. e. approached most nearly to the equilateral triangle). 
These triangles are in Fig. 28 drawn with a thick line. 
The computation was carried out from the base through the 
triangles I—II—IV, I—IV—IX and II—III—IV to the sides IV—IX and 
II-IV; from there through IV—IX—XI and Ш--ТУ—ХГ to triangle 
HI—IX—XI The smallest angle which in this manner entered into 
the computation was, as will appear below, about 38°, the greatest 
about 88°; by the double computation of the side III—IX one might, 
therefore, lay claim to have a good control. 
It was, however, a practical proceeding to compute all the sides 
of the net in respect of the subsequent construction of the points on 
the plane table and map. The further computation of the net, there- 
fore, included the triangles I—IIJ—IX and II—II—IX with control 
at the side III—IX, as well as the triangles I—II—XI and I—IV—XI 
with control at the side IV—XI. Triangle I—IV—XI was avoided, 
because it contained an angle of about 17°. 
Before the actual computation could begin, the above-mentioned 
correction of the angles had to be undertaken in a lump for all of 
the triangles in the base network, through which the computations 
were to be carried; only in this manner could we protect ourselves 
against the possibility of corrections in certain triangles leading to 
absurd consequences in others. Therefore, as indicated below, a 
summary was made of all the angles, and in this the corrections 
were added. For our guidance we had the following: 
1. The cairn at Station IV had been difficult to point from all 
the other stations; the sights at IV, therefore, had to be considered 
less accurate. 
2. The bearing IX—XI was rather uncertain; it had not been 
possible from IX to see the food tin marking the axis of cairn XI. 
3. In the square I—XI—II—IV the sum of the angle was 360°00'02”. 
As the two triangles with the common side IV—IX only had the 
errors +4” and — 6” in the sums of the angles, whereas the other 
two had the errors + 11” and — 13”, it seemed most natural preferably 
to correct the bearings I—II and ПТ. This harmonized with the 
fact that the sights I—II and II—I were less good. The signals of 
the stations I and II were painted white out of regard to the darkish 
soil; but on the night preceding the observations at those two 
