iej2 Of the frejh Water Polype. 
till they difcharge themfelves, otherwife you’ll be in dan¬ 
ger of breaking their arms off, however when an arm is 
broke, it is quickly repair’d again, but for fome days 
there appears a fweliing or calloflty in the place which 
wears off in time. 
River, or any other very foft water, agrees belt with 
them, or what is taken up clear out of fome ditch or 
pond i but that which comes from a fpring or pump, or is 
in its own nature hard or fharp, prevents their thriving, 
and kills them in a few days. 
They are bed; kept in fuch large glaffes as hold three 
or four quarts of water, for in a glafs of this, fize, the 
water need not be renewed fo frequently, efpecially if 
the feces are taken out from time to time, wdth the fea¬ 
ther’d end of a pen, to which it very readily adheres. 
Befides the trouble is in fome meafure faved of feeding 
each particular polype, for here you need only throw in 
a parcel of worms, and let them take their chance, but 
then all of them are not conftantly fed, nor any of them 
fo often as in the fmaller glaffes. 
The worms you feed them with, muff alfo be well 
cleanfed from the mud, and always remember to wafh 
them in clean water, every time you feed the polypes 
therewith. 
Polypes are to be fought for in the bye-corners of 
ditches, puddles, and ponds $ for it is obfervable, that 
the wind drives them together with the plants, upon 
which they float into thefe places ; although we may 
fearch for them in fome places without fuccefs, yet on 
coming there again, they may perhaps be found in great 
abundance. 
There are fewer of them in the waters in winter, than 
in the other feafons. About the month of April, duck- 
weed begins to rife above the fuperfeies of the water 
