vol. xx. (i) MINERAL WATERS NEAR GLOUCESTER 
29 
MINERAL WATERS IN AND NEAR GLOUCESTER, 
WITH SOME SUGGESTIONS AS TO HOW THE 
IMPORTANT CONSTITUENTS HAVE BEEN FORMED. 
BY 
GEORGE EMBREY, F.I.C. 
(Read March 19th, 1918.) 
Some explanation may be advisable as to why I have 
selected a study of the Mineral Waters in and near Gloucester 
as the title of a paper to be read before the Members of the 
Cotteswold Naturalists’ Field Club. There are portions of it 
which might better have been submitted to a society of chemists, 
yet as they all refer to a locality limited in extent, it seemed 
advisable to deal with it where it would be best understood. 
The observations and inferences which I propose to place 
before you have been collected from many thousands of analyses 
made during the past forty-four years, and as the character of 
the water derived from the earth is entirely controlled by the 
nature of the rocks through which it has passed, there can be 
no impropriety in placing the results before the Members of 
this Club. 
What is meant by a mineral water ? All natural waters 
contain mineral matter, and it may be supposed that the 
quantity of this would be a guide in deciding as to whether 
they are entitled to such a designation. 
The surface waters of this district vary considerably. The 
total solid matter may be anything between 20 and 200 grains 
per gallon, the surface waters running over the Middle Lias 
vary in mineral contents between 20 and 40 grains per gallon, 
while that from wells sunk in the Lower Lias clays may contain 
