[ 3 ' ] 
The Waters of the Spring du Tied have the fame 
Quality as thofe of the Salut : They produce the fame 
Effed when mixed with Galls ; yield Cryftals exadly 
of the fame Figure, but in yet greater Quantity. 
I have not made the fame Experiments with the 
other Springs at Bagneresi but, it is probable, they 
do not differ from the former, except as to More or 
Lefs. 
To conclude thefe Obfervations; I have alfo found, 
at Bagneres , a particular aquatic Plant, which I had 
feen, for the firft time, in the great Bafon of the 
boiling Spring at Dax : It bears neither Fruit nor 
Flower, as far as appears; its Subftance is intirely 
compofed of fmali Bladders full of Air ; the Surface 
of it is like Net-work or Canvas; it grows only in 
the hottefl mineral Springs; it may be found at the 
Spring, called, de la Reine , at the Bath des Bauvres, 
and at the New Spring ; but mod plentifully at that 
Place where Part of the Spring de la Reine iffues out 
of a Rock near the Capuchins. Nobody, as far as I 
know, has ever fpoken of this Plant, before I gave 
an Account of it Two Years ago, at the public Re- 
fumption of our Academical Meetings. The Vege- 
tation, and particular Qualities of it, may, perhaps, 
deferve to be more narrowiy examined ; and I believe 
it may be properly called, Fucus thermalis vejlcularisy 
Superficie reticulari. 
Flowever different the preceding Subjed of my 
Difcourfe may be from what I am next going to 
fpeak of ; I beg Leave to fet down One Obfervation 
more, which 1 have made on the Bie du Midy> and 
of which the Refult may prove curious. 
It 
