C '«o 3 
then gently moved the Tube with the Stand it was 
fixed in, near the fufpended little one : The little 
Tube manifeftly receded fo much, that a crofs blue 
filk Line firetched horizontally at about an Inch Di- 
ftance on the oppofite Side, would fometimes, upon 
the firft Approach of the great Tube, be touched by 
it. 
Experiment II. 
Three fcarlet Silks, pendulous each by Loops from 
a crofs filk Line, and clofe together,^ being rubbed 
downwards two or three times, between the Finger 
and Thumb, fhewed a conliderable repulfive Force 
with regard to each other, forming themfelves imme- 
diately into a triangular Pyramid, and continuing in 
this State of Separation fome time, and which fhews 
their Attradion at the fame time, with regard to 
other Bodies not excited, coming to them when 
brought near them. 
I obferved the fame repulfive Force in three yellow 
and three green Silks, under the fame Circumftances, 
and excited in the fame manner, but not in fo great 
a Degree as in Scarlet. In Blue the repulfive Force 
was Ibarce difcernible after feveral times rubbing. 
Scholium. 
The Rev<l Dr. Stephen Hales j in his 1 2th Article 
of his 13th Experiment, in his fecond Volume of 
Statical Ejfaysy obferves, “ That if a Piece of one 
“ of Bronchia or Gills of the MufcleShell-Fijhy be 
“ cut off, and put into a fmall concave Glafs, with 
three or four Drops of its Liquor, and be then 
placed under a double Microfcope, the Blood may 
“ be 
