I Will relate another ccnfiderable Experiment of the Cold Fer- 
mentation caufed by the Mixture of SalArmoniac and Oil of Vitriol. 
char.gc of ti e If after having rnade the Mixture of 4 ounces of Oil of Vitriol, 
th^^?}iL "^^'^' ^ ''^i' ^ Arnioniac^ one throws upon it a fpoonful of 
tunlfLTX^ common \Vater, In the tune when the Fermentation is ftrongeii:, 
mni^u ^nd Oil the Cc ld is gi carefi, ar^d the Thermometer falls with the greateft 
ofF^/trioU irto qnicRn^^ls, the Fermient ceafes, and the Coldchanges immediately 
a njery hoi -....^ ^ jA^j^ and makes the Liquor of the Thermomeuer to 
Ferment vpith a , , , ' 
little Water. rilevei; ii.gtl. ^ . , ^ r c ^ - • 
Oi'f^ IT .y ji.iy-conceivethe iieaion or this Experiment, if we 
COD-' cr .;a> ' Water heating quickly and ftrongly with the Oil 
of v':..rK liiakes here the iame Effeft. And this fieat is luffici- 
entiy ^ :ac, at Lj:aL time to dettroy the Cold or the coagulated 
Parcic ine Water. by it felf being otherwlfe .very propi^to dlf- 
folve lhiS Qoagiduni. 
k remains, that I give an account why Sea-Salt heats with dif 
ferent Acid Liqnois : but as to that, we ought to enquire into the 
f Nature of this Salt, which would carriey us too far. 
1 will only fay before I make an end, that I do not here pretend 
to enumicrate exatlly all the Cold Diffolutions and Fermentati- 
ons^ I have related only theExperimjents wdiich I have made upon 
, tlie Salts and Liquors which we ofrenefi: ufe, and which I thought 
moft ccnfiderable. As to the Reafons which I have given of tk-efe 
Cold Diiiblutions and Fermentations ^ I advance them only as 
Conje£ cures, which I fubmit lo the Judgment cf Phyliclans, 'who 
'irndeiitand thefe matters better than i do. 
The Nc'V^ Thermometer^ whofe Ejfefts is TT-ore qukk than that of 
Ordinary Ther?Kometers. 
TT's compofed of a Bowl or Bottle of Glals, wh'c!i has no opeirti\2;, but 
by^a Jittle Tiinnel at the end; and which delcends \- the bottom. 
This Tunnel is open at both ends B C. B dip? into the L-qtior E which 
is at the bottom of the Bowh / ^ 
The fpace ofthe Boctleof Glafs is fili'd with Air, which has no Com- 
munication with the Exterior Air. 
When the Air contained in this Space is rarefied by 'the exie ior Air 
which touches the Bottle, it prefks at the fame time the Liquor E, and 
obhges it to rife by B in the Tunnel BC. On tlie contrary, when it 
CoixlehTeth by the Exterior Cold, by not prelTing the Liquor E, it per- 
mits that which is i?; Tunnel to Fall 
The Readn.cfs wuii ■', hic'n the Air Condenfcsor KareEesby :Co!d and 
to Heat, makes ihe Efrccis of t his Thermometer much more luJden ih ui 
tbofe of any other fort. Befid. ?, ilie Efj-ecls of this is m.uch greater, t-he 
Air being miOre capable ota great Rarefadion, or of a great Con.leii6'i- 
on, tlian any other L-q-]or. 
Printed for S. Smith and B: Walford^ Printers to the Royal Society, a, the 
Princes Arms in St Pauls Church-yard. 1701, 
