bright Sun, or that ic might be fome duft in the Aire. 
The great Micrefcopeb^ingfitttd in the day-h'ghtfor this piece 
of Fi{Ii,we cxamin'd ic that night, and it yielded no h'ghc at al!, 
either by the view of the Glals.or otherwife. 
Finding it dry,I thought that the moifturc of Spittle.and tou- 
ching of it^might caufe ic to fliine ; and fo it did, though but a 
very little^in a few fmall fparks^ which foon extingnifli'c. This 
we faw with the bare eye ; not in the Glafs. 
The Fifli were not yet fetide^ nor infipid to the bcft difccr* 
m'ng palats: And I caufcd two Fifh to be kept for further Try- 
allj two or three daies longer , till they were fetide in very hot 
weather - and then I expected more brightnefs, but could find 
none,either in the water, by ftirring it, or in the Fifli, taken out 
of the water. 
And fome Trials I made afterwards with other boy Id Mack- 
rels (as is abovefaid) with Hke pickle^, but fail'd of the hke fuc« 
cefs. 
This feafoR ferves for many Trials in this kind,and by better 
Micref copes, or better ordered. And in thefe Vulgarities we may 
perhaps as well trace oat the caufe and nature of Light, as in 
Jewels of greateft value,c^^. 
Some Conftdtratiom 
Touching a Letter in the Journal des Scavans (?/May 24; 
In ISlum, 9. of thefe TranfaUiens were publiflVt the Schemes 
and Defcriptions of certain Waies of Seunding the Depth of the 
Sea witbeut a Line 5 and o{ Fetching up JVaterfrom the bottom of it; 
together with fome Experiments already made with the former 
of thefe two Contrivances. The Author of the French Journal 
det Scavans found good , to infert them both in his Journal 
of May^i but in another of M<»y 24. inriniaccs, that thefaid 
Schemes and their Defcriptions are not very clear and intelligible 
(he means^that they were not well underftood by French Rea- 
dersj) propofing alfo fomo Difficulties,relating to that SubjccSl", 
and efteemcd by him necefTary to be fatisfied , before any ufe 
could be made of the faid Inftruments. 
Upon this occafion^the Author of thefe TraUs thinks fit,here 
torcprefent, Firft, 
