KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 
TE AMSTERDAM. 
APPENDIX 
TO THE 
PROCEEDINGS OF THE MEETING 
of Saturday October 30, 1909. 
(Translated from: Bijvoegsel aan het Verslag van de gewone vergadering der Wis- 
en Natuurkundige afdeeling van Zaterdag 30 October 1909. D1 XVIII). 
OOSTTEUTS. 
Note on some determinations of the loivering of the level of 
the ground of the Netherlands alQng the sea coast , deduced 
from records of water levels and levellings. By Prof. H. G. 
VAN DE SANDE BaKHUTZEN. 
It will only be examined in this note in how far we are justified 
ln including to changes of the level of the ground compared with 
the surface of the sea from old records of water-levels in Amsterdam, 
ar *d from readings of water-gauges published by Mr. Ramaer, Head- 
engineer, Director of the hydrographic survey. 
A Water level of the Y at Amsterdam . 
In a communication in the meeting of the Roy. Acad, of Sciences 
at Amsterdam of March 1908 'Proceedings Vol. X p. 703), of which 
a copy is annexed, I concluded that the level of the ground of Am¬ 
sterdam did not perceptibly sink or rise in relation to the mean 
31 
Proceedings Royal Acad. Amsterdam. Vol. XU. 
