1807.] 
pleasure with very little trouble or ex- 
pence, and may be repaired with the 
greatest ease, when found necessary. 
a 
MR. APSLEY PELLATT’s (ST. PAUL’s 
CHURCH-YARD), for an improved Me- 
thod for admitting Light into the in- 
ternal Parts of Ships, Buildings, and 
other Places. 
‘This method consists in placing an illu- 
minator in suitable apertures in the decks 
or sides of ships and vessels, and in build- 
ings and other places, to answer as a win- 
dow or sky-light. The illuminator is a 
piece of solid glass, of a circular or ellip- 
tical form at the base; but the circular 
form is the most productive of light, 
and the strongest against acccident: it is 
convex on the side to be: presented out- 
wards, to receive and condense the rays 
of light, and has a flat or plane surface 
on the inside of the room or apartment 
which it is intended to light. It: is, or 
approaches to, a segment of a sphere or 
spheroid, and both sides may in general 
be left polished; but if the il'uminator, 
is placed in a situation where any danger 
may be apprehended of its being acted 
upen as a buruing glass one:side at least 
si’ “Ad be ground orroughed. Its size is 
varicds, according to the purpose or si- 
tuaton for which it is designed, and its 
€ “ity is increased or diminished ac- 
cor ‘o the size required. The ordi- 
nar .ensions are a base of about five 
inch: Jiameter to one half inch in height 
from the centre of the base. The illumi- 
nator is fixed in a square or circular 
fre | made of wood or of metal, with 
glazi ~—sutty or other cement, For 
deck:  nd‘other parts of ships,- its con- 
structiou is so managed by thickening 
the edges as to render it capable of e- 
sisting any injury from the weight of 
goods of every description, and the beat~- 
ing of the waves of the sea, in the ports 
and scuttles. It is let into the deck with 
the convex part projecting above it so-as 
to receive the rays of leht, and fixed 
with or without a wooden or metal frame, 
according as the space will allow,’ a 
groove of only one quarter of an inch will 
be sufficient to keep it firm, and in a deck 
of three inches thick, one quarter of an 
inch is bearing enough; in decks of less 
substance, the bearing must be increased 
one eighth of anineh. The under part 
of the deck must be sloped away all 
round, so as to form a small dome, ‘that 
the rays of light may diverge in all dé 
xections. By being fixed in a square or 
Montrury Mac. No, 163. 
New Patents lately enrolled. 
oft 
round frame with, or without: hinges, it 
may be made to open and shut, for the 
free admission of air in hot climates. In 
dwelling-houses, buildings, and all other 
places, it is far superior to the sky-lights. 
now generally used, not being liable to 
accident or leakage, nor can water pass 
under what it is fitted into. For build- 
Ings, it is necessary that one side should 
remain unpolished, as the rays of the sun 
produce the-prismatic colours when shin- 
ing on the illuminator. This precaution 
ig unnecessary in ship’s decks, as’ the 
traffic on them in a short time grinds or 
roughs the upper surface, but in no degree 
to prevent the effect. Under-ground 
vaults and cellars, wherever any commus 
nication may be made with the open air, 
may also be lighted with this invention, 
excepting only where from its situation it 
may be hable to injury from the passing 
or repassing of horses, &c. The illumi- 
nator will also prove a very important 
substitute for the glass now used in Tan- 
thorns for lighting the powder magazines 
in ships of war, care being taken that 
the convex side be in the inside of the 
lanthorn where the light is placed. 
ee 
MR. HENRY MAUDSLAY'S (CAVENDISH- 
SQUARE), for certain Improvements in 
the Construction of Steam-Engines, 
These improvements consist in reduce 
ing the number of parts in thé common 
steam-engine, and so arranging and con- 
necting them as to render it more com- 
‘pact and portable; every part thereof be- 
ing fixed to and supported by a strong 
frame of cast-iron or other materials, 
perfectly detached from the walls of the 
building in which it stands, and thereby 
less expensive in fixing, and not liable to 
get out of order by the sinking of foun- 
dations, &c. The different arrangements 
and combinations adopted are fully de- 
scribed by drawings of a one-horse steam- 
engine ainexed to the specification, to 
which the reader must be referred; the 
same proportions being observed in en- 
gines of any power. 
MR.GORDON HUDSON’S (OXFORD STREET), 
for a new Girth Pannel for asiening 
Saddles onthe Backs of Horses. 
‘The object of this invention is to pres. 
vent accidents and incenvenience from 
the slipping forward of the saddles on 
horses. ‘The nature and operation of the 
girth are not so fully described in the 
specification as might have been wished ; 
but its structure, and the mode adopted 
3G t@ 
