146 
THE GEOLOGIST. 
43. Orthoceratidse. 
44. Lituolitidse. 
45. Cristacidse. 
46. Spherulidse. 
IV. Cephalopoda. 
47. Radiolidse. 
48. Nautilidse. 
49. Ammonitidse. 
V. Heteropoda.' 
7. x\ list of fossils not vegetable or testaceous. 
On the Nature and Origin of the Saline Waters of Cheltenham. 
By James Buckman^ F.G.S. 
A subject of great interest and one which is intimately con- 
nected with the Geology of this neighbourhood, is that of the 
Medicinal springs which so much abound in this district ; these 
springs depend for their therapeutic effects upon the presence 
of certain chemical compounds which are held in solution with 
the water, the most prevailing of which will be seen from the 
following table of the contents of 16 oz. of water taken from the 
Pittville Spa at Cheltenham, as deduced from my own ana- 
lysis.* grs. 
Chloride of Sodium ... 43 
Sulphate of Soda . . . . 20 
Carbonate of Magnesia . . . 5 
Carbonate of Soda .... 5 
Carbonate of Lime .... 2 
Bromide of Sodium . . . 0-3 
Iodine ; a trace .... 
75 03 
Now it will be seen from the foregoing table that Chloride 
of Sodium (Common Salt) is far more in quantity than any one 
of the other ingredients, and this fact will be useful to us in re- 
*See Guide to Pittville p. 24. 
