by the Cold j and to have no light 5 that I could difcern in w 
place dark enough. And for fear, that this effe^ft may have 
proceeded not barely from the operation of the Cold , hut 
alfo from thac of the Salt (for which fufpicion you would 
fee reafon enough , if I could fti^w you my Trials about 
Shining Fiji}) I caufed another time a piece of Whiting to be 
puc in a Pipe of Glafs feal'd at one end , and having feen ic 
fhine there , I lookt upon it again , after it had ft^yed but s 
quarter of an hour , by my eftimate , in t frigorifick mix- 
ture, which the Giafs kept from touching the Fifh-, and yet 
neither I , nor a Youth , that I employed to Icok on it , could 
perceive in a dark place y that it retained any light - which 
whether the Cold had deprived it of by thac great change oE 
Texture 5 that the Congelation ot the Aqueous Juyce of the 
Fifli (which I have fcveral amesobferved tobelurainous)may. 
be fuppofed to have made in the Body invaded by it 5 whe- 
ther the effe 61 depend more principally on fomeother caufe^, 1 
fliiU notnpw^xamiqe, 
Bijferences. 
r. ihe fr^ dijference I ehferved hetmxt a Live Coal W 
Shining Wood /^, T'hat, whereas the light $f the former is- 
nadily €xtingmfl)ahlc by Comfrej(ion Qas is dvi&us in the pnt- 
Bice of fuddenly extingmpUng a piece of C»aI hj treading upm- 
ic ) I could mt find that fuch a Comprefion > M l could c&nv.c- 
mcntly give ^ without lofmg fight of its operation r muld put out 
or much injure the light cv*n of fmaH fragments of Shining 
Wood : One of my Trials about which I find thus fet down a- 
mong my Notss about Light. 
I took a piece of Shining Wood , and having preft^ it be- 
tween two pieces of clear Glafs ( whereof the one was pret» 
ty flat 5 and the other convex J fo that 1 could clearly fee 
the Wood through the Glafs , I could not perceive , that 
the compreffion , though it fometimcs broke the Wood in- 
to feveral fragments , did either deftroy orconfiderably alter 
the Light. 
. This Experiment I repejited , with the fame fuccefs, Bur^ 
whac- 
