1811.] Patents lately Enrolled, 
To prove how oxygen, with fire that glows. 
And azote gas combin’d, its mass compose. 
"Tis thine to give borealis Its dyes 
That flush with sanguine streams the azure 
skies j 
To part the texture of its changeful frame. 
Arrest its course and analyze its flame. 
Tlie ignis-fatuus too, that hops amain. 
In dance refulgent, o’er the marshy plain. 
Thy power expounds 3 his glowing lamp 
divides, 
And thus its golden compound strait decides. 
To earth’s dark womb extends thy boundless 
gaze, 
Whose wonders vast thy piercing eye sur- L 
veys, I 
From clay’s hard substance to the diamond’s | 
blaze ! J 
That noble art for healing worth re- 
nown’d,' 
Which pours i^s cordial on the burning 
wound, 
From thee receives the balsam Is bestows, 
To give the tortur’d frame of man repose. 
But were my Muse with long detail, to tell 
One half the charms which in thy aspect 
dwell, 
Objects unnumb'er’d might my verse pro- 
long, 
Minute the theme, and tedious were the 
song 3 
Then here I close,—and own thee as my 
guide, 
My youth’s delight, my study, and my 
pride I 
William TycEESo 
PATENTS LATELY ENROLLED. 
Communications of Specifications and Accounts of Nezo Patents, are earnestly 
solicited, and will always command early Notice. 
HR. ARTHUR Woolf’s, (lambetii,) /hr 
Improvements in the Construction and 
Working of Steam Engines, calculated 
to lessen the Comu?}iption of Fuel, 
HE nature of this invention may be 
thus described : The working cy¬ 
linder of the steam engine has no bottom, 
but is enclosed in another cylinder of 
such dimensions that the space between 
the two, which space is called the re¬ 
ceiver, is equal to at least the contents 
of the working cylinder. The enclosing 
cylinder has a bottom, and the two cy¬ 
linders are joined together at the top by 
flanches, or any other suitable means, 
and the lower rim of the working cy¬ 
linder is’about as far distant from the in¬ 
closing cylinder as the distance between 
the sides of the two cylinders. Instead 
of having a void space for receiving 
steam below the piston, Mr. W. intro¬ 
duces below it, and into the receiver, 
such a quantity of oil, &c. as shall, when 
the piston is at its greatest height, in thg 
working cylinder, fill all the space below 
it, and fill also the receiver up to the 
height of a few inches above the lower 
rim of the working cylinder. If the en¬ 
gine is to be worked by the pressure of 
the atmosphere, the receiver has a com¬ 
munication with the boiler, which com¬ 
munication being opened, steam is ad- 
ynitted into, and fills the receiver above 
the oil. If the communication between 
the receiver and the boiler be now shut 
off, and a communication be opened 
from the receiver to the condgnser^ a 
Monthly Mac, No, 
vacuum w'ill be formed in the receiver, 
and then the pressure of the atmosphere, 
acting upon the piston, will cause it to 
descend in the working cylinder, pres¬ 
sing the oil, or other fluid body, before 
it, and causing the fluid to ascend into 
the receiver; after wliich the steam is 
again admitted for the next stroke. If 
the engine is to be worked by the actiorn 
of the steam upon the piston, then the? 
working cylinder must, as is usual iii 
steam engines so worked, be furnished 
with a cover. In this case, instead of 
the communication usual in the engines 
in common use, for the alternate admis¬ 
sion and condensation of steam above 
and below the piston, the communica¬ 
tions in this engine are to the upper 
part of the working cylinder, and to the 
upper part of the receivers, the receiver 
in the engine answering to the space be¬ 
low the piston in other steam engines; so 
that, when the receiver is open to ths 
condenser, and the upper part of the 
working cylinder open to the boiler, the 
piston ascends, and vice versa. To 
prevent waste of steam, and to keep up 
the temperature of the oil, the receiver 
may be enclosed in a steam ca‘^e, or 
heat may be applietl externall}'. Tliere 
should always be some oil above the pis¬ 
ton to tile height of a few inches, to 
prevent the passage of the atmospheric 
air, or of the steam, downwards, by the 
side of the piston. To prevent any tfe- 
viation of the quantity of oil by thewo.^k- 
ing of the engine, means must be pro- 
SH vidsd 
