t 600 ] 
a great deal of labour, which the lungs (already too 
much oppreffed) muft otherwife undergo from a 
crude and ill-conco£ted chyle. Agreeably to this 
we find, in the Efjays Physical and Literary of Edin- 
burgh *, two well-vouched hiftories of patients far 
gone in conlumptions, with the ufual fymptoms of 
pain in the bread:, cough, grofs fpitting of fetid mat- 
ter, difficulty of breathing, he&ic fits, and morning 
l'weats, perfectly cured in a few weeks, by the ufe of 
the Hartfell-Spaw near Moffat ; which, contrary to 
what is obferved in mod; natural chalybeat waters, 
contains a fixed vitriol of iron. 
Thefe, Sir, are the few obfervations I had to 
make at prefent on this fubjedt. I have taken the 
liberty to addrefs them to you, in order, if you 
thall think proper, to be communicated to your il- 
luftrious Society ; which, I hope, will continue to 
lated: pofterity thofe interefting refearches for the ad- 
vancement of every branch of natural knowlege, by 
which it has already acquired fo much and fo de- 
ferved honour; and am, with the greatefl refped;, 
S I R, 
Your moil obedient humble Servant, 
Strand, Feb. 28. 1758. 
Edward 
* Vol. I. art. xii, p. 364. 
LXXX. 
