er 
At Karang Sago photographie self-registering instruments 
for declination and horizontal intensity had been mounted, 
likewise a declino-variometer for visual observation. A vario- 
meter for the vertical intensity, which would have required 
a very sensitive magnetic balance, was not available. 
The photographie instruments with the registering apparatus 
had been mounted on a large pillar in a bamboo hut with 
thick, lieht-tight walls; the intensity-instrument having 
moreover been protected from quick and large variations of 
temperature by woodeotton and eloths. 
The visual declinometer had been set up in another hut, 
and allowed the declination te be read with accuracy to 
two seconds of arc; a few hours before eclipse-time, however, 
the thread gave way, and the stretching of a new one entirely 
spoiled the observation. 
For the Hor.-Int. an old MeyersrerN-unifilar with a thick 
copperbox was made use of, in which a cylindrical magnet 
had been suspended by new-silverwire (length 43 em.) and 
brought in a perpendicular direction at the magnetic meridian 
by torsion only. 
A thermometer had been located in the magnetbox. 
The declinometer was an old LaAMmorT variation-apparatus 
with a magnet consisting of three lamellae (78 XxX 6 mm.) 
attached to a cocoon-thread 45 centimeter long. 
The benzine-lamps for both the instruments were also 
placed on the broad pillartop-surface, the ray of light retur- 
ning from the declination-instrument being reflected by a 
mirror in the direction of the registering-cylinder. 
The photographic paper had been wound on a revolving- 
cylinder RrcHarp-pattern. 
Two cylinders — one with revolving-time of six hours, the 
other of twenty-four — were employed by turns, being intro- 
duced into a wooden case, in the front-wall of which was 
a eylinder-lense. 
A mirror separately set up threw a base-line on the 
paper. 
NA et 
