(826) 
hmwithld^fiftedfromrDaking at this time any further Ob* 
fervations of Rain-water^ 
Mean time, this Town of Delft being very rich in water^and 
we receiving from the River of MaaJc frefh water , which ma- 
kech oOr water very good ; I viewed this water divers times ^ 
andfawextream fmali creatures in it,of different kinds and co- 
lours^ and even fofmall, that I could very hardly difcern their 
figures; But fome were much bigger, rhedefcnbingof whofe 
motion and fliape would be coo tedious : This only I muft men- 
tion here, that the number of them in this water was far lefs than 
thacofthofe, found in Rain-water; for if I faw a matter of 25 of 
them in one drop of this Town water, that was much. 
In the open Court of my houfe I have a well, which is about 
I s foot deep, before one comes to the water. It isencompafled 
with high walls/o that the Sun,though in Ca^cer.yGi can hardly 
ffiine much upon it. This water comes out of the ground,which 
is Tandy, with fuch a power, that when I have laboured to empty 
the vveH, I could not fo do it but there remained ever a foots 
depth of water in it. This water is in Summer time fo co!d,that 
youcannot poflibly endure your hand in it for any reafonable 
time^ Not thinking at all to meet with any living creatures in 
it, (it being of a good carte and clear^ looking upon it in Sepp. 
of the laft year, [ difcover'd in it a great number of living ani- 
mals very fmallj that were exceeding clear, and a little bigger 
than thefmalleft of allthat lever faw J and I think, that in a 
grain weight of this water there was above 500 of thofc crea- 
tures, which were very quiet and without motion. 
* In the Winter I perceived none of thefe little animals,nor have 
I feen any of them this year before the month of and then 
they appear*d not very numerous, but in the month of Augufil 
faw them in great plenty. 
'^uly 27. 1 676. 1 went to the Sea-fide , at Schevelingen^ the 
wind coming from Sea with a very warm Sun-fhine ; and view- 
ing fome of the Sea- water very attentively, I difcover'd divers 
Jiving animals therein. I gave to a man, that went into the Sea 
to wa(h himfelf, a new Glafs-bottle, bought on purpofe for that 
end, intreating him, that being on the Sea,he would firft wafh it 
well twice or thrice, and then fill it full of the Sea- watery which 
defireof mine having been complied with, I tyed the bottle 
dpfe with a clean bladder,and coming home, and viewing it, I 
