( 140 ) 



Borneo, 4 on Celebes, 1 on Amboina, 1 on Banda, and 

 1 on Ternate, to wliich stations I hope 20 or 30 more will 

 be added in the course of next year. 



I have been uijable to commence the magnetic survey of 

 the Archipel. At the temporary observatory there was no 

 room in which the magnetograph could be placed, and as 

 long as this instrument was not in working order I thought 

 it unadvisable to begin the magnetic survey. But even if 

 the temporary observatory had afforded sufficiënt locality for 

 the magnetograph, it would still have been impossible for 

 me to commence this part of my work, for as long as I had 

 no other than Javanese assistants, I could not leave the 

 observatory. I, therefore, have been obliged to postpone the 

 magnetic survey, but I hope that ere long it will be named 

 as a pai-t of the work done by the Batavia Observatory, 



I will not conclude this without expressing the hope that 

 all those who take an interest in the study of nature, will 

 unite with me in thanking our Government for the oppor- 

 tunity now so liberally afforded for studying the magneti- 

 cal and meteorological phenomena in the East Indian Ar- 

 chipelago. 



Batavia, P. A. Bergsma. 



December 1878. 



