468 
METHOD OF RAISING HULLS OF SHIPS. 
any kind. It is particularly adapted for the 
use of domestic families who aie desirous not 
merely to make their own bread, but to be 
sure that the flour which they use is a genuine 
product of good wheat. As respects its utility 
to emigrants and distant settlers, we have lea- 
son to believe tliat its merits have already 
been very satisfactorily tested , the dui ability 
of the grinding surtaces being such as to ren- 
der a renewal of them apparently unnecessary 
for a series of years. A mill of this kind may 
1 e seen at No- 20, Paternoster-row,— iffec/m- 
fiic's Ma^uzine. 
PRESERVING PASTE. 
Paste made by putting acetate, or sugar of 
lead, into it, instead of the old way of mixing 
it with alum, keeps it from moulding, and 
quite moist for months together. — New Month'- 
ly MogaZXue- 
NEW LAMP. 
A lamp of a new construction, which de- 
scribes a circle of light of about thirty feet in 
diameter of the apparent intensity of sunshine, 
showing the objects within its sphere as dis- 
tinctly as those on the table of a carneia- 
nbscura, has been elected at the head of the 
inclined plane in St. Leonard’s depot. Its 
object is to enable the engine-men to have a 
cli.stinct view of the inclined ropes during the 
night, and this has been fully attained. 'I’he 
lam p consists of an aigand burner placed in 
the focus of a large speculum of a peculiar 
form, by which the whole light is distributed 
just on the space where it is required ; it is 
computed that the light on the above space 
is equal to that of twenty-five or thirty .-iini- 
iar hnrneis in common lamps. A lamp of 
this kind we have no doubt u ould be iiselul 
for Ollier purposes : it app'ears tons that the 
largest assembly loom might be brilliantly 
lighted by one placed at each end of the room, 
and one would he sufficient to light the stage 
of a theatre. 'I'he cost of this one is said to 
be about 200/., but we understand it saves 
an annual expenseof about half that sum. The 
inventor is a Mr. Rankin, and he names it the 
Colloidal lam p— probably because the light 
is thrown from it in the form of a cone. — 
Caledonian Mercury. 
CURRENTS IN WATER. 
In this last number of Silliman's Journal^ 
in an article on “ currents in water.” it is 
asserted, that if a tub or other vessel is filled 
with water, and a hole made near the middle 
of the bottom of it to discharge it, the water 
will acquire a rotatory motion from west to 
south, or opposed to the apparent motion of 
the sun ; and if means are used to produce 
an opposite motion, upon withdrawing those 
means the former direction will be resumed. 
This cannot be the effect of chance, but of 
natural laws constantly operating. — Guern- 
sey Star. 
HOUSEHOLD MANUFACTURE OF 
SUGAR. 
A remarkable proof of the facility with 
which beet root sugar manufactories may be 
established is presented at this moment at 
Wallers, in the department du Nord. Four 
of the villagers, by advancing 50 francs each, 
have formed a joint capital of 200 francs, 
and with this they produced between 40 and 
50 lbs. of sugar, of rather inferior quality, a- 
day. 'I'hey employ curry combs to rasp the 
beet roots, which they put into a napkin- 
press to extract the juice, and then boil the 
syrup in common culinary boilers. — Ibid. 
NEW SHIPS’ SIGNAL LANTERN. 
A most admirable invention has recently 
been brought into use, and is likely to meet 
with general' adoption, intended to prevent 
those accidents which are the cause of so 
much loss of property, as well as the annual 
sacrifice of a number of valuable lives, it 
consists of a ship’s lantern, of copper, 
strongly and efficiently constructed, and 
possessing the means of being regulated so as 
to show a light of different colour, according 
to the tack upon which the vessel bearing 
it may be sailing, or the position in which 
she lies. A set of instructions accompanies 
each lantern, by which the master is inform- 
ed what light he is to show on each change 
of tack and position, and thus a mutual 
understanding is attained amongst navi- 
gators as to the meaning of the signals ex- 
hibited. The changes of colours are effected 
by the following simple contrivance : — The 
lantern contains an interior case, capable of 
being turned round, and having windows of 
glass of several colours. The lamp of the 
lantern has a strong reflector and powerful 
‘‘bull’s eye,” or magnifier, to project the 
light, opposite which, in the outer case, is an 
aperture. By turning round the interior case, 
each coloured glass window is brought in 
front of the bull’s eye, and thus a light of 
the colour required is projected. — Hull Packet. 
KEMPS SUBMARINE APPARATUS. 
We understand another attempt is about 
to be made to raise the hull of the Cnmeleon, 
by Mr. Kemp, who, having obtained a patent 
for the buoying principlf, has received per- 
mission from Government to make an experi- 
ment on this ill-iaied vessel, and in the event 
of its proving successul, the wreck as it may 
be raised will beconie the reward of the enter- 
prise. Mr. Kemp’s apparatus consists of a 
number of empty punclieons, each open at one 
end, and having a bar of iron across, by wliich, 
after being sunk, thgyaie attached to a chain, 
previously passed round the wreck by the 
divers, who next employ themserves succes- 
sively applying to each cask the elastic tube 
through which they are filled by the air-pump. 
