988 
none would frequent them ; and it is 
evident, that to make them service- | 
able in preventing accidents, they 
should be formed as much as possi- 
ble, so as to induce people to prefer 
them to any other situation for the 
above purposes. | 
It need scarcely be mentioned, 
that the circumstances which would 
constitute the safety of those ponds 
for the above uses, would be their 
small depth. 
Easy Method of purifying Water.— 
Bib. Phys. Econ. 
A member of the Society of 
Sciences and Belles-Lettres at Douay, 
has published this method, which 
§ 
ANNUAL REGISTER, 1806. 
consists in forming a filter, by plac. 
ing inan empty flower pot a wicker 
frame horizontally, over which four 
or five inches thick of pounded” 
charcoal are to be Jaid, and on that 
a bed of sand, and over all a paper 
pierced with holes, to prevent the 
water, on being poured in, from 
forming pits in thesand. ‘The filter 
is to be renewed at the end of some — 
time. 
‘This simple, and cheap me- 
thod will enable even the poorest 
man to procure pure and wholesome 
water, which is a circumstance of 
great consequence in many foreign 
countries, and even in some parts 
of England. 
ANTIQUITIES: — 
