/ 
Luminous Water InfeSts. 40 $ 
Hence he accounts for the Fifhermen’s fore¬ 
telling a Temped: from an extraordinary 
glittering of the S.ea and Lakes : thefe Ani¬ 
malcules, as he fuppofes, being diflurbed and 
put in Motion at the Approach of fuch a 
Change. 
Thefe Animalcules are found, he fays, at 
the Beginning of Summer, more plentifully 
amongft the Weeds than in any other Part 
of the Water : but they increafe furprizingly 
in a fhort Time, and difperfe themfelves in 
the Waters every where *, 
In Plate xv. b> c, d, rep refen t a very fmall 
Infedl found in fome Ditch Water, b and c 
fhew it in the Adtion of moving from Place 
to Place, which is performed by faflening 
the Tail-End upon the Plate of Glafs, bend¬ 
ing the Body, extending and directing the 
Head downwards, then fixing the Head and 
drawing the Tail to it, whereby is made 
what may be termed one Step: and by re¬ 
peating thefe Steps its Progreflion was pretty 
nimble, and much refembled that of the 
Species of Caterpillars called Loopers. Its 
Podure when at reft, after being tired with 
Motion, orjuf]t before it began to fet for¬ 
wards, is feen at d. 
I could not by the flridleft Obfervation 
difcover any fuitable Apparatus about the 
* A large Account of this may be feen tranflated from the 
Italian, in the Univer/al Magazine, for December, 1751* 
D d 3 v Head, 
