£ lt 5 3 
VII. Description of Kilburn Wells, and Analysis of their JVaier. 
By Mr. Joh. Godfr. Schmeisser. Communicated by Sir 
Joseph Banks, Bart. P.R.S. 
Read February 23, 1792. 
Those wells lie to the right of the Edgeware Road, about 
two miles from London, in a dry, but verdant, and gently 
rising meadow. 
They spring about 12 feet below the surface, and are 
covered with a small stone cupola. 
The diameter of the well near the surface of the water is 
about five feet ; the depth of the water was in July and Au- 
gust two feet ; this its general depth increases in winter, at 
times, to three feet ; the changes in the atmosphere do not 
appear to affect either the quantity or quality of the water. 
This mineral water is not perfectly bright, but of rather a 
milky hue ; it has a mild and bitterish taste, with little or no 
briskness, as containing a very small proportion of fixed air. 
On dipping for the water, or otherwise agitating it, a sulphu- 
reous smell is perceived near the surface ; which, however, soon 
goes off in a temperature of about 80 degrees of Fahrenheit's 
thermometer, which I have used throughout . 
The specific gravity of the Kilburn water is to distilled wa- 
ter as 1,0071 : 1,0000 ; its general temperature 53 0 , which was 
not affected by a change of 10 degrees in the temperature of 
Q* 
