[ 347 ] 
As I had often experienced the power of electricity 
in the combination of black filk with white worked 
ftockings, there remained to try but that of white filk 
with black worked, which anfwered as I expeCted, 
and feemed to complete the demonftration. 
A phenomenon fo new, and of fo curious a nature 
as this experiment prefented, could not but for fome 
time engage my attention. I faw, that if this ap- 
pearance did not arife from fome accidental or colla- 
teral caufe, correfpondent effeCts would follow, upon 
the combinations of the intermediate degrees of light 
and fhade, between the extremes of white and black. 
I have had a particular attention to this in the expe- 
riments I have knee had occafion to make, and fo far 
as I have yet been able to go, it appears to anfwer 
my expectation. Neverthelefs, as this is a matter that 
merits a more minute examination, we may hereafter 
take it up as an immediate objeCt of inquiry ; with 
a view to determine, if light and colours have* of their 
own nature, a relation with eleCtricity, and in what 
that relation conliks. 
In the mean while I (hall purfue my principal de- 
lign, which is to invekigate from experiments the na- 
ture of that eleCtric virtue, with which the animal 
fubkances under conkderation appear to be endued. 
I have already made fome progrefs, farther than what 
is contained in this paper ; and I fhall continue to fol- 
low the views that feem naturally to open to my in- 
quiry. If I make any difcoveries, or come at any 
conclukons that may merit the attention of the curi- 
ous, they fhall, together with the experiments on 
which they depend, be fubmitted to the judgment of 
this learned Society. 
Y y 2 
New 
