at which all the annual expenses were engaged for in the 

 original contract, but which includes only the wages of a 

 working engineer, the fuel, and the few trifling articles re- 

 quired to keep the engine and pumps in working order. 



The incidental difficulties that have occurred in the 

 works, have depended on the influx of sand into the bore- 

 pipe, by which it has occasionally become so choked as to 

 prevent the flow of water through it. On more than one 

 occasion the water has, after the delay of a few days, forced 

 its way through the obstruction : on others it has been ne- 

 cessary to employ workmen to remove the mass of dense 

 niatter by which the passage was impeded. To prevent, as 

 much as possible, a recurrence of this evil, and to secure also 

 a more free and certain spring, the boring was resumed last 

 year, and was carried through the bed of sand lying under 

 the plastic clay, and continued on to the face of the chalk, 

 the layer of flints on the upper surface of which was broken 

 through. The additional depth thus bored, was 30 feet; 

 and the total depth from the surface is consequently 220 

 feet. 



From the occasional interruptions that have taken place 

 in the supply of water from the well, no serious inconveni- 

 ence has, however, been at any time experienced. But in one 

 instance, which occurred in the extreme drought of the last 

 summer, so much anxiety was felt by the Council, that they 

 applied for aid from the Regent's Canal Company. With a 

 promptitude and liberality that merit the warmest thanks of 

 the Society, the Directors of that Company instantly and 

 gratuitously granted the assistance asked for; and not only 

 authorized the pumping from the Canal, by manual labour, 

 of as much water as was required, but even supplied the 

 machinery requisite on the occasion. Although the well was 

 very soon afterwards reestablished in working order, the 

 temporary supply thus liberally afforded was most opportune 

 and valuable, both with reference to the beauty of the Gar- 

 dens and to the health of the animals. • 



