HISTORY OF THE COUNTY BOTANY OF WORCESTER. 255 
take in the drainage of districts where no conservation of 
water now takes place, owing to impervious beds occupying 
the surface, so it will practically enlarge the catchment area 
to a great extent. It does not matter where the water is put 
in, whether where the bed is now empty or where it is full, 
providing that in the latter case the water already present 
does not rise to the surface and the situation is not too far 
away from the pumping station to be supplied, because the 
water will tend to find its own level. I have placed a restric¬ 
tion as to distance, in the direction in which the bed is full, 
because the further away the opening the higher the natural 
“ head” of water would be, and when only a few feet remained 
to be filled up the increased head obtained by filling up would 
have an insignificant result owing to resistance. On the 
whole it is fortunate that it should be so, for this same resis¬ 
tance, by producing an artesian gradient in the water-bearing 
bed, prevents the contingency of a well being opened sufficiently 
far to the south-east for the water to freely overflow, and so 
reduce the water-level in the whole bed to its own surface 
level. There is another good reason why this is not likely to 
occur, but as it depends upon data still to be considered, I have 
deferred giving it. It remains now for us to consider the 
storage capacity of the material of the bed, and the area to be 
filled, before we can arrive at any approximate idea of the time 
within which a satisfactory result might be anticipated. 
(To be continued.) 
HISTORY OF THE COUNTY BOTANY OF WORCESTER. 
BY WM. MATHEWS, M. A. 
(Continued from page 225.) 
The Appendix to the “ Midland Flora,” forming Yol. III. 
of the work, was published in London in 1821. It introduces 
us to some new correspondents, and contains the following 
Worcester records :— 
Fumaria ( Corydalis ) solida, 58. Abberley Woods. Mr. Hickman, 
surgeon, Ludlow. 
Silene anglica, 37. Areley, near Stourport. Mrs. Gardner, late of 
Stourport. 
Stellaria glauca, 36. Lickliill Lane, Worcestershire. Mr. Hickman. 
* Hypericum montanum, 62. Blackstone Rock, near Bewdley. Perry. 
Ulex nanus, 59. Astley Common. This was doubtless U. Gallii 
Planch. 
