( S97 ) 
hcrej as far as the numerous bubbles excited in the Water would 
give us leave to difeern it (for they did, though not unexpe&ed- 
ly, femewhit difturbe the Experiment, which inconvenience we 
might have prevented, if we had thought it worth while) we 
could not perceive, that ekher the abfenceor return of the Air 
had any great operation upon the Light of the immerfed Body : 
which y et did not keep me from intending to makeafomewhac 
like Trial with Shining Wood (when I can get any) fattened to the 
lower part of a clear Giafs, and covered over, but not very deep, 
with Quick fiver, Of which pra&ice I fliall not now ftay to give 
you the Reafons, having el ie where fully enough exprefled them. 
And that this Setiion may acquaint you with fomething be- 
hides the (feemingly) infignificant Experiment related in it, I (hall 
here inform you (fince I perceive, I did not in thefirft Papers I 
fent you ) that though, when I formerly put together fome 
Notes about Luminous Bodies, I confined not my Obfervations 
to one or two forts of Fillies, yet the Experiments, fenc you fince 
October latt, were all of them (except a Collateral one. pr two) 
made with Whitings , which among the Fifhes, I hive had occa- 
sion to take notice of, is (except one fort, that I cannot procure^ 
the fitteft for fuch Trials, and confequently fit to be named to 
you, to facilitate their future ones, in cafe you think it requiftce 
to make any upon fuch fubje&s. 
Experiment XV. 
T He other of the two neighbouring Experiments, 1 lately 
mentioned {viz, the ninth) I told you, when I fent it you, 
needed a reiteration to confirm it, fince we had but once tried ic 
fand that without all the conveniency we defired) that a Shining 
Body,which upon the firft withdrawing the Air loofeth much^but 
not all its Light, may l?e deprived of the reft by continuing ia that 
unfriendly place, though the Air be no further exhaufted. To 
profecute therefore both the Experiments in one Trial, we took; 
fomewhat late at night a piece of rotten Filh, which we judged to 
fiiine too ftrongiy, to be quickly deprived of all its Lights and ha- 
ving put it into afmall and clear Receiver , we found (as we had 
forefecn) that the Light was much impaired, b$t nothing near 
Rrr fuppreffed 
