C *34 ) 
eontexed; but hollow within like Pipesjand adapted 
to draw blood upwards. ^ . 
I have fometimes Obferved,that a Gnat well filled with 
blood} not to recede from our Skin, untill a drop of 
Water} had been re jefted out of her Bodie : Which 
I guefle to be the Serumj and in (b Ihort a time to 
be feperated from the Blood, and rejefted as an ex; 
crement. 
When the Gnats, new bred , do alcend from the 
bottom of Cijierns, they are fvhite, and do feem to 
want Feet, and Wings 5 but thefe do appear in the 
(pace of a quarter of an houre, and they are wont lb 
long to adhere to the fids and walls of the Cijiemsi 
untill the wings are now enough expanded, are hard* 
and are fit for flight. 
But forae will Objeft, how I cou’d lb accuratly Ob« 
forve, what Gnats do in the bottom of Cijierns s 
to whom I Anfwere , I Obferved all things in a 
Glals Veflel made for that end, into which I put all * 
thofe things, which are wont to be found in cijierns, 
to wit Lime, little Stones, Earth and Rain Water, to 
which I put the above delcribed Red srornss. Allb 
I was forced to place that Veflell in a cold place; 
alfo often to renew the Water, and to admit the 
frefh aire. . 
For experience taught me> thole little Worms, 
for defedi of Coolnefle and frelh and well tempered 
Aire, all foon to Die : Therefore by meanes of the 
pellucid Clafle , I Daily and diligently obferved , 
what was Daily done in it , and what changes hap« 
pened therein. 
SeBm» 
