II—GEODETIC OBSERVATIONS. 
By P. CAMPIGLI. 
Taking as starting point a site near Bnjongolo, the height of which above 
sea-level was known from barometric readings, at that point, which for 
shortness will henceforth be simpiy called Bnjongolo, was constructed an 
astronomic station, the latitude of which was determined by meridian and 
circummeridian zenithal observations of the sun, and the longitude by means 
of lunar occultations of stars. 
Then in the neighbourhood of Bnjongolo a base was chosen and measured 
between the points A and B {see the annexed diagram of the triangulation.) 
The distance was obtained either directly by fixing stations with the 
tachometer at the two extremes A and B, or by measuring with the metric 
2 A 
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