In ] 
J. A Brafs Pan, whereon to fallen Gudgeon or a 
any fmall Filh, to fee the Blood circulate in its 
Tail. In order for this, the Tail of the Filh 
mull be fpread a-crofs the oblong Hole e, at 
the fmall End of the Pan: Then flipping the 
Button / into the Slit£, through one Corner 
of the Stage, the Spring at the bottom of the 
Stage will fix it fteady for viewing. The Filh 
mull be tied on with a Ribband, to prevent its 
ftruggling. 
K. Is a Glafs Tube, which for viewing the Cir¬ 
culation in a Frog, or Newt, is more conveni¬ 
ent, becaufe the Objeft is more eafily con¬ 
fined. In a Newt or Eel, the Tail is the bell 
Part; but in a Frog, the Web only between 
the Toes can be viewed, no other part being 
enough tranlparent: When the Objedl is well 
expanded in the infide of the Tube, Hide it 
through the Cavity under the Stage, and bring 
the part to be viewed exa&ly under the Mag¬ 
nifier. There are feveral of thefe Glafs Tubes 
of different fizes, and the more confined the 
Creature is, the eafier he is managed, and the 
quieter will lie to be examined. 
A Frog is reprefented in the Tube, to Ihew 
the Pofition it Ihould lie in. 
h. A long Wire, with a Worm at one End to 
pull out the Cotton kept in the Tubes to 
prevent their breaking, and likewife to clean 
the Tubes when foul, by winding fome Cot¬ 
ton round the Worm, and rubbing it about 
within them. 
L. Is a Brafs Cell that contains a fmall Lens, 
which is called the Magnifier: This fcrews on 
B 2 to 
