( 244 ) 
The two intermediate integrals become 
U 
gel — eos dz + Wee = f(y, 
y 
= Sef ge 
pel — {us dz + Wendy = fles 
NI td 
In this case the only condition is that 4 is independent of p- 
The intermediate integrals are found by uniting the three integrals 
u, UV, W of 
de dy z dq i 
0 TAN q ij A(x.y,24) 
to 
u = f(r). 
u = f (w). 
Remark. It seems that the form sub I may still be chosen 
more generally. 
Physical Geography. — “Two earth-quakes, registered in Europe 
and at Batavia’. By Dr. J. P. VAN DER STOK. 
A. 1. In the night of 29 to 30 September 1899, a heavy earth- 
quake caused serious damage at the south coast of the isle of 
Ceram and in the Mollucco’s. 
The first official report, sent by the Resident of Amboina to the 
Governor-General immediately after the disaster, runs as follows: 
„In the night of 29 to 30 September at Ih 45m a. m. a heavy 
earth-quake, followed by a series of sea-waves, caused considerable 
damage at the south coast of Ceram and, in a less degree, also at 
the isles of Ambon, Banda and the Ulias-isles. Several villages 
at Ceram's south coast have been devastated ; in the Elpavutih-Bay 
all except two. The prison at Amahei has been completely destroyed, 
the fortifications partially, whereas the presbytery and the churches 
remained unhurt, as also the garrison and the civil officers at 
Amahei and Kairatoe. 
As the Government-steamer Arend proved incapable of doing all 
the work, the steamers Gouverneur-Generaal ’s Jacob and Japara 
of the Royal Pakketvaart-Company were chartered in order to eonvey 
victuals and medical assistance and for the transport of the wounded, 
whilst also the Resident of Ternate was requested to give assistance. 
