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II. Determination of the latitude of S. Salvador do Congo. 
A few observations have been obtained about the latitude of San 
Salvador, the old capital of the former kingdom of Congo. They were 
made before the factory of the “N. Afrik. Handelsvenn.”, situated 
about 1 K.M. north of the centre of the hill on which the town is 
built (562 m. above the sea-level). 
Only the following meridian altitudes were observed. 
Date. Object. Reading. | Corr. Temp. | Bar. Latitude. 
| | | 
May 8 1895 | Sun L. L. | 182° 49'10"| — 1'10"5| 27° 714 |— 6° 15718" 
„RIO = 131 45 20 11¢ 27.5 714 15.3 
„ ll w | @ Crucis. | 67 31 50 1 13 22 713.5 26.1 
| | 
If to the results from the observations of the sun we apply the cor- 
rection + 5".3, the mean result for the latitude becomes: 
—6° 15' 16" 
with an uncertainty of perhaps 10” or still more. 
Dr. CHAVANNE (Map of Justus Prrrnes 1886) found for the 
latitude of San Salvador (the hill extends over a few kilometers only) 
— 6° 20' 10” 
and for the longitude 14° 47'18" East of Greenwich. Very probably 
there is also an error in the longitude of more than 20’, the true 
eastern longitude being smaller. 
Physics. — “Methods and Apparatus used in the Cryogenic Labo- 
ratory. IT. Mercury pump for compressing pure and costly 
gases under high pressure’. By Prof. H. KAMERLINGH ONNES. 
(Will be published in the Proceedings of the next meeting). 
Physiology. — “Lipolytic ferment in human ascitic fluid”. By 
Dr. H. J. HAMBURGER. 
(Will be published in the Proceedings of the next meeting.) 
