C *07 ] 
as the Threads and Silks before-mentioned, and fount 
the Experiments fucceed as in Threads of the fame 
Number, except that they did not recede fo far from 
one another, which muft neceifarily follow from their 
greater Weight. 
M. B. Thefe Experiments were made fometimes 
with the Tube held over, fometimes held under the 
crofs Line 5 but they generally fucceeded beft when 
the Tube was held under the Extremities of the 
pendulous Wires, which in this Cafe feparated much 
farther, and kept their repulfive Force much longer. 
Experiment VIII. 
I muft not omit here, that I hung up two Frag- 
ments of Barometer Tubes, each about a Foot long, 
by blue filk Lines going through each, fo that they 
hung parallel, horizontal, at equal Heights, and about 
one quarter of an Inch afunder ; upon holding the 
excited Tube above and under them, they manifeftly 
receded from each other. 
I fufpended the fame Fragments of Tubes by blue 
filk Lines of equal Length, from a crofs blue Silk in 
a perpendicular Pofture, each having a little red Seal- 
ing-wax at the upper End, to hinder the Strings from 
flipping off: The excited Tube being brought near 
them, they receded manifeftly, efpecially at the lower 
Ends ; the Diftance from one another, when at Reft, 
being about a quarter of an Inch. 
C o R o L E A R Y I. 
From the repulfive State of the pendulous Threads 
tied tranfverfly with two or more Threads, and bend' 
O 2 ing 
