( 824 ) 
with a little preffing, I took a drop thereof, and in it 
difcover'd a mighty number ot living Creatures. I repeat- 
ed my obfervation the fame evening with the fame fuccefs, 
but the next day I could find none of them alive j and 
whereas I had laid that drop upon a fmall Copper Plate, 
I fancied to my felf that the exhalation of the moifture 
might be the caiife ot their death, and not the cold wea- 
ther, which at that time was very moderate. 
In the beginning of April I took the Male feed of a 
Jack or Pike, but could difcover nothing more than in 
that of a Cod-fi(h, but having added about four times as 
much Water in quantity as the matter itfelf was^ and 
then making my remarks, I could perceive that the Am- 
mal cul a did not only w Six ftronger and Twitter, but, to 
my great amazement, I faw them move with that celeri- 
ty, that I could compare it to nothing more than what 
we have feen with our naked Eye, a River Fifti chafed 
by its powerful Enemy, which is juit ready to devour it; 
You muft obferve that this whole Courfe was not longer 
than the Diameter of a fingle Hair of ones Head. 
Yll. Scala graduum Caloris. 
Calorum Defer iptiones ^ figna. 
CAlor aeris hyberni ubi aqua incipit gela 
rigefcere. Innotefcit hie calor accurate 
locando Thermometrum in nive comprefla 
quo tempore gelu folvitur. 
Galores aeris hyberni. 
Calores aeris verni & autumnalis» 
Calores aeris seftivi. 
Calor aeris meridiani circa menfem Ju- 
lium. 
Calor maximus quem Thermometer ad con- 
taftum 
0,I,2; 
6 
12 
