[ 2 34 ] 
**' the latter are rubbed backwards and forwards- 
“ through the hand, or the former with the hand 
M applied thereto, they give manifeft tokens of the 
cc eledric power. Moreover the glafs of thefe tubes 
u and globes ought to be thin ; led the thicknefs of 
£c the glafs fhould prevent the tranfmiffion of the 
tc odours. It is neceffary, that the fpices be dry, and 
“ broken fmall, and that fpirituous liquors, as well 
“ as the more liquid balfams fhould be well mixed 
lc with powder’d chalk. But how great the quantity 
u may be, either of the fpices, balfams, or fpirituous 
u liquors, which fhould be included, cannot be de- 
<c ter mined ; becaufe it is not yet certain, how much 
<c of the eledrical power is neceffary for diffolving. 
<c the odoriferous particles, and carrying them along 
<c with it. But as the fad itfelf is manifeft, I have 
<c taken upon me to tranfmit to the Royal Society, for 
a which I have the higheft regard, two globes and 
u four tubes. I hope, that thefe tubes, when rubbed 
£t as ufual between the hands furnifhed with a piece 
“ of thin and fomewhat rough cloth, and that thefe 
iC globes, if mounted upon the pillars of an eledrical 
machine, and either rubbed with a naked but very 
“ dry hand, or with a piece of filk or woollen cloth, 
(t will tranfmit odours, plainly different from the 
<c odour of the eledric matter, and which perfons 
tL here at Leipfic of good nofes have diftindly per- 
u ceived. To know indeed this difference, it is ne- 
ceffary, that, before the prepared tube is rubbed, a 
u tube containing nothing odoriferous be tried ; and 
<£ left the fridion fliould be attended with no effed, 
<i great care muft be taken that the outward lurface 
u of the globes and tubes be perfedly dry. 
“ Of 
