Since 1900 ozone has been used quite extensively as an oxidant and disinfectant in European waters. Because of the expense and other problems involved with using ozonators, ozone has not been favorably received in the US. Recently, however, technologists have discovered methods for controlling or eliminating a majority of the problems; moreover, water‐treatment researchers have found that ozone possesses additional favorable characteristics other than a pleasant odor.

BIRDS OF SOMERSETSHIRE.forehead and streak above the eye yellowish white the ear-coverts grey and brown. The young male birds much resemble the female above described, but have no grey in the centre of the feathers on the upper parts, these being dark brown, bordered with rufous."As to the eggs, I have only to make the same remark which I have made with regard to those of the Hobb}K estrel, Falco Tinminculus. The Kestrel is the commonest haw^k in these parts, and is still very numerous, in spite of the persecution of the gamekeepers, in whose larder it is constantly to be found, though perhaps it does not do them so much mischief as they suppose : it does, how^ever, undoubtedly do some mischief, and is fully aware that young partridges and pheasants are good eating.This hawk is very docile, and easilj^tamed, even when taken in full maturity. I had one lately which I shot in December, 18G8: as it was only slightly wounded in the wing, I brought it home alive, and kept it till the autumn of 18G7 : it very soon became quite tame, and would take food from the hand. It would eat raw meat, but much preferred birds and mice -certainl}^birds, for choice, rather than anything else. The size of the bird* seemed to be no =;= Has been kuowii to kill and eat a Hooded Crow.-' Zoologist' for 1868 (S. S. p. 1007). a bird, as it was afterwards sent to me, and on examining its stomach I found it quite full, containing, amongst other things, the legs, toes and claws of a Missel Thrush, which had probably made its last meal. Once when fishing in the pond here I saw a House Sparrow save himself most adroitly from the attack =1^Y arrell, vol. i., p. 75. 20 BIP.DS OF SOMERSETSHIRE. of a SpaiTowbawk : the Sparrow was flying across the pond when the hawk made a swoop at him ; perceiving the hawk just in time, the Sparrow at once dropped close to the surface of the water : down came the hawk so close that his wings touched the water. The Sparrow, however, escaped, the hawk not being able, for fear I suppose of a ducking, to make his swoop effectual. We may judge of the rapacity of the Sparrowhawk from the following notice : -A brood of young birds of this species w^ere taken and placed in a cage, and in two da3's the old hawks brought them ten birds, namely, two young Peewits, two young Thrushes, a Sky Lark, a Meadow Pipit, two young Chaffinches, a Willow Wren, and another newly-hatched squab.* Nobod^^seems to have much to say in favour of the Sparrowhawk, but perhaps it may occasionally do a little good, as mice may be added to its list of food, and Meyer says insects, such as cockchaffers and grasshoppers. The nest of the Sparrowhawk is generally placed in a tree, the deserted nest of a Crow or Magpie being frequentl}^made use of. The plumage of the Sparrowhawk differs much, according to age. In the adult bird the bill is blue; cere greenish yellow ; irides yellow ; all the upper parts are bluish grey, except a small white band on -'1= See ' Zoologist ' for 18G5, p. 9440. cies. The Laniadse, or Shrikes, come first in order of these t...

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