C5PO 
noufaefs oftheFifti, ws re- admitted it, and upon its ruftiingin, 
perceived the Light to be as it were revived^and increafed , thofe 
parts of the Fifli, that were fcarce vifible before, or (hone but 
dimly, receiving prefcntly their former fplendour. 
^fld not to leave un-profecuted the remaining part of the Ex- 
periment, which was to try. Whether it was the if/Wof the Lu- 
minous jsody, or only tk; GreatneJ^ of the bulk^ and the Vividne^ 
of Z/^i'^, and, if I may fd fpeak, the r^^^/em; of chc fabP-^nceit 
refided injthat made the difference between the Fijh and the Wood-^ 
We put part of the Fi(h of another kind, that fhone much more 
faintly, than thAty hitherto fpoken off, and but in fome places 5 
and by the withdrawing the ^ir we made fome of the luminous 
parts difappear, and the others fo dim, as fcarce to be difcerned ^ 
and yet both the one and the other regained their former light 
upon the return of t he -.^ir. 
^ad to purfue the Experiment a little further, we put in fuch 
a piece of the fitft Fifh, as chough it were bright, was yet but 
thin and not confiderably great, andnpon pumping out the i<rir, 
we found it, according to our Expe£i:at40fl, quite eclipfed,thougIt 
it recovered its Light upon the ^irs re- entry. 
THefe^ Sir, are the Experiments, 1 have lately made about Shining Bodies 
in. cur Engine. More I ^ouU have tried^ notwithfiandmg the troMe we 
found in managing the Engine in the darh^y jfrocten Wood had mt failed us ^and 
if Imre not in a flace^ Kvhere GUfs-mens Shops are not near fo. well fHrniJht as 
the Stationers, 
1 fcarce doubt, but thefe Experiments will occaflon among the Virtuofi fcve- 
rd Quere'^ and Cpnjediires, according to the differing Hypothefes ^?»^ In^ 
{juifitions^to which men are inclined. And partictilarly ^tis probable^ that fome 
-will make ufe of this Difcojirfe to countenance their Opinion.^ That notrnthfland' 
tng the Coldnefs {at leaft as tofenfe) of Fijhes and other Animals there may be 
ifitheUsMandBhud a '^yiul^ki^d of Vire, hie h needs Air, as wel^as thofe 
Fires that are fenfibly hot : which may lejfen the wonder^ that Animals Jhould 
not be able to live when robbed of Air. And if I had no^ time^ I could pofsibly 
furniJhyoH with fome other Trials^ that feem much to favour the Comparifony 
though^ as td the Opinion it felf of f>, Vital flame / p^all not now tell you my 
thoughts about it* And though not only the Cartefiatis will perhaps dra^ an ar* 
gument from^the pafl phaenomena in favour of their Theory of Light, but di- 
vers others will difcourfe upon them, and propofe further Queftions^;^^ perhaps 
Inquiries futable to their fever al Hypothefes -.^yet I Jhall content myfelfatpre^ 
fm to have faithfully delivered the Hiftorical part of thefe Apparences, without 
making 
