SUNIER: The Laboratory for Marine Investigations, 



13 



pean population of Batavia improved considerably. Undoubtedly the 

 introduction in 1820 of the vaccine laws also contributed towards this 

 improvement. 



To-day many European districts in Weltevreden can be reckoned 

 amongst the healthiest residential areas in Java; very few cases of intestinal 

 trouble occur in them, while it is practically out of question to become 

 infected with malaria there. 



I have referred to the fact that the old lower town of Batavia is quite 

 harmless to those who spend the daytime only there. For considerations of 

 health, therefore, no one need hesitate to spend lengthy periods in Batavia, 



Plan No. 1. Site of the Laboratory for Marine Investigations at Batavia. The 

 cross-hatched areas are buildings, the dotted areas hardened ways and paths. The 

 broken line enclosing the site indicates the wire fence. The parallel lines, at first close 

 together and then gradually separating denote the water's edge. Tlie meaning of the 

 numbers is explained in the text. Scale 1 : 1000 approx. 



