' ( 878 ) 
After this I caufed the Frog to run againft the Spider, 
who thereupon ftruck him in the Rack with his Stings, 
arid fo wounded him in two feveral places, that in one 
place he left a red fpeck, and in the other a blue fpot. 
Hereupon I brought them together again, then the 
Spider fix^uck his Strings into the Fore-leg of the Frog, 
who upon that ftruggled fo hard that the Spider was 
forced to leave him, and I obfcrved that fome few of the 
Blood-veffels in the Frogs Legs were wounded. 
Once again I forced the Frog to juftie the Spider, who 
upon that ftruck both his Stings into the Kofe of the 
Frog, after which they both ftood ftill about half a mi*- 
nute, then I open'd the Glafs and took the Spider out, 
and for the Frog he fat about an hour without any mo- 
tion, then ftretcht out his hinder Legs, and fo died. 
The next day I took another Frog about the fame fize 
with the former, and another Spider, and put them both 
into the fame Glafs, the Spider paft by the Frog with- 
out meddling with him, but when I fuddenly (hook them 
together, the Spider ftruck both his Stings in the back of 
the Frog, but I could not perceive that he had wounded 
him fo far as the Veins, for there was no Blood fpilt. 
This Frog v/as very fhy of the Spider, and as foon as 
the Spider came near him, or toucht him with his Feet 
or Claws, the Frog ufed his ntmoft efforts to avoid him. 
Again, I brought the Frog fo near as to touch the 
Spider with the fore-part of his Body, who thereupon 
gave him two Blows with his Stings in the lower part of 
his Head, one of which pierced the Blood- Veffels, fo 
that there remain d a red fpot after 3 the Spider prefently 
quitted th^ Frog, becaufe of the ftrong efforts the other 
made to get from him, and then fet herfelf to cleanfe 
her Stings with a moifture that came from her Mouth for 
that purpofe 5 then I feparated the Spider from the Frog, 
and viewed the Circulation of the Blood in the Veins of 
the latter, that I might fee whither any Alteration was 
therein. 
