Tuer ZooLocist—OcrToBER, 1876. 5111 
shallow tank, about eight feet by five feet nine inches, and nine 
inches deep. Fitted in the middle of this tank are two ornamental 
fountains, which are adaptations of Barker’s Mill: these thoroughly 
aérate the water supplied, by tossing it in the form of spray through 
the air and distributing it over the surface of the water in the tank. 
The bottom is covered with clean shingle: over this may be seen 
large numbers of young fry hatched out late this season. 
The fish-fry, after going through a careful course of feeding 
in these nursery tanks until they become about two inches in 
length, are drafted off to the rearing pond at Sunbury, which is 
now under Mr. Forbes’ care, and where at the present time are 
upwards of 20,000 young fish of this season’s hatching. These are 
thriving so rapidly that they will at the end of two years be in 
condition to start on the business of life on their own account in 
the rippling waters of the Upper Thames and its tributaries. 
The system of water supply and aération of the tanks in the 
Fish Saloon at Chertsey Bridge is original and ingenious, but not 
without some defects, which may, and I believe will, soon be 
remedied. The machinery and many of the appliances are the 
adaptation of ideas suggested and carried out by a neighbouring 
firm of engineers, Messrs. Charles and James Taylor, of Chertsey. 
Though somewhat different to what would have been arranged by 
one experienced in aquarium construction, they are very creditable, 
and to some extent effective. The water is lifted by means of a 
pump, worked by a small steam engine, of two horse-power, from a 
well to a height of twenty-four feet, into a reservoir containing 
about five thousand gallons placed upon the roof of the building. 
In addition to this is a second or reserve engine of one horse-power, 
nominal, but in both these engines the power may be considerably 
increased—it is said to ten horse-power; but I cannot help thinking 
this must be an error. This quantity of water (5000 gallons) serves 
the whole system for a period of twenty-four hours, when the upper 
reservoir is again recharged. On leaving this reservoir the water 
descends directly into each tank, from whence it flows directly 
away into two outer reserve tanks in the garden, and thence to the 
river. One of these tanks is thirty-six feet long, five feet broad 
and two feet deep, the other ten feet by five feet and a half, and 
two feet deep. On its way from the tanks the water is caught by 
an ingenious bucket arrangement, automatic in its working, which 
drives two pairs of ordinary kitchen bellows: these force air into 
