242 = Iodine in the Mineral Waters of Saratoga. 
it was in reducing the different salts which I employed, to 
the greatest possible degree of purity, that the greatest part 
oO i ted. Ihave in all cases, in which it was 
in my power, deduced the atomic weights of bodies from the 
rigid analysis of the neutral salts into which they enter, be- 
cause it is much easier to obtain neutral salts pure, than any 
of the metallic bodies which constitute their bases. Indeed, 
not a few of the metals have never yet been exhibited in a 
°9 
Art. 1V.—Iodine in the Mineral Waters of Saratoga. — 
Communicated for the Journal of. Science, by Joun H. 
se a M. D. of Saratoga Springs, in the State of New- 
ork. 
Tue Mineral waters of Saratoga, which have become so 
celebrated for their Medicinal qualities, are situated in a low 
marshy valley, along the termination of a ridge of seconda- 
ry limestone ; they discover themselves in a bed of blue marl, 
which covers the valley throughout its whole extent, and to 
an unknown depth. On digging into this marl, to any con- 
siderable distance, in almost any direction, we are sure to 
find a mineral water; in some places, at the depth of six or 
eight feet, it is discovered issuing from a fissure or seam in 
the underlying limestone, while at other places, it seems to 
roceed from a thin stratum of quicksand, whichis found to 
alternate with the marl at distances of from ten to forty feet ; 
at this last depth, the marl is interrupted by a layer of bowl- 
lers of a considerable size, beyond which no researches have 
yet bee 
