1816.] during the Year 1815. 43 
Carbonate of magnesia...... Be Ad a Se 0°25 
Muriate of magnesia .....-.....50- 1:95 
Miriteate cf lime) 4.2. S6G C 0:07 
Sulphate of lime .......... HU. Ue ot OSs } 
Sulphate of magnesia .............. 2700 
Common SANE. 5 n.a's.9¢isqs eo o9 Sas tis 13°08 
17°69 
He shows that muriate of lime and sulphate of magnesia are not 
incompatible salts, as has been generally supposed ; but that they 
may exist together in solutions sufficiently diluted with water. His 
dissertation was published in September, 1814 (Schweigger’s 
Journal, vol. xi. p. 8); so that he anticipated Dr. Murray, of Edin- 
burgh, who has advanced an analogous opinion in his analysis of the 
mineral waters of Dunblane and Pitcaithly. 
2. Geilenauer Mineral Water.—This water was likewise analyzed 
by Pfaff. He conceives that during the carriage a portion of the 
carbonic acid which it originally contained was lost. The iron, 
which constitutes an ingredient of this water at the spring, had 
precipitated in the form of a brown powder. Ina civil pound of 
this water he found the following ingredients :— 
Carbonate of lime ., 4°8 grs. | Common salt .... 4°0 grs. 
Carbonate of soda .. 4°0 Carbonic acid gas 26 Paris cub. in. 
3. Mineral Water of Dunblane.—This newly discovered mineral 
water has been lately analyzed by Dr. Murray, of Edinburgh, whose 
valuable paper on the subject has been published in the fourth and 
fifth numbers of the last volume of the Annals of Philosophy. The 
specific gravity of the water was 100475. A pint of it was found 
to contain the following salts :— 
Commoil salts J :sisied s! ndsidesowivn we nieee 24 g 
Muriate of lime ..... g aoitd'a ete Sie oae ke 
Pulphate of Tins | sjiaief. des dee at)» 3°5 
Carbonate of lime ......... ibeefeine-) re 
Oxide or iron? 2S ha Be is 2 OT 
46°17 
But he supposes that the sulphate of lime does not exist in the 
water originally, but is formed during the evaporation by the action 
of sulphate of soda on muriate of lime. According to this very 
probable idea, the real constituents of this water are as follows :— 
WR OES ce ee ee rex 21 
piariare or line, fo Bree Pee 20°8 
ROMO Or MOC lacavacco sy; hss stesics oy 
Carbonate’of limes. oo 0.  ec ccec cs OD 
Oxide of iron eoeccerenesetovesesen 0°17 
