66 ADMONiriON TO LORD BIIOIIGUAM AND INFIDEL PLILOSOIM lERS, 
some of the water into the tube, the whole 
box and water will weigh more than it did ; 
and to restore the balance, more weight must 
be put into the scale A. If the box is three 
inches diameter, every inch that the water 
rises in the tube will add above four ounces to 
the xceiglit of the box and tube, whatever 
be the bore of the tube ; for the pressure of 
the water in the box, in all directions, will be 
increased by the weight of a body of water 
whose height is the height of the water in the 
tube, and whose base is the extent of the 
surface of the water passing on the tope/ 
of the box. Now the top being three inches 
diameter, its surface is about 7^ square in- 
ches ; and a body of water one inch high, 
and 7^ square inches broad, is 7} cubic inches 
of water, which weigh about four ounces. 
Thus, raising the wire a foot, will add three 
pounds to the weight of the water.” — Library 
of Useful Knowledge, Hydrostatics, p. 0. 
It is by a very simple application of tire 
principle thus set forth, that I propose to 
effect the desired object ; and all 1 can see 
to wonder at is, that mankind should have 
been so long without discovering the grand 
arcanum, when so convenient a law of nature 
stared them in tlie face all the while, 'i'liere 
are, indeed, some “ roaring infidels,” who 
venture to assert that there is no such lav/ 
in existence except in the pages of the tract 
published “ under the superintendence of the 
Society for the Diffusion of Useful Know- 
ledge.’’ But can it, for an instant, be be- 
lieved that so monstrous a blunder as the 
laying down, with all due pomp and circum- 
stance, of such a non-existent law, could be 
truly laid to the charge of a learned body, 
with no less profound a philosopher than 
my Lord Brougham at the head of it, and 
whole scores of men of science of first-rate 
eminence on its committee 1 'J’he thing is 
evidently quite out of the question. A friend 
of mine, indeed, who delights in throwing 
cold water on all plans of perpetual motion, 
did startle me a little by'observing, that if the 
pressure of the water in the box were increas- 
ed equally “ in all directions,” the upward 
pressure would exactly counterpoise the 
downward, and that, therefore, the '' loeight 
of the box and tube” would remain the same 
as before ! There certainly appears to be 
something in this objection ; but, if it were 
well-founded, there would be an end at once 
to my grand project. Tdiat being the case, I 
prefer practice to mere theory, and devoutly 
believe that, as the committee-men of the 
the Society would hardly allow their names 
to be paraded on the covers of the book as 
having “ superintended” its composition, 
without having actually tested by experiment 
all the propositions it contains (and especial- 
ly one so novel and remarkable as that in 
question,) it is absolutely and literally true 
that the specific gravity of water, at a given 
moment, may be owe, while in the next it may 
be a hundred, or a hundred thousand ! 
I remain. Sir, 
Your most obedient servant, 
April 2S,\B36. F. H. 
WOOD AND QUANTRILL’S PA I’ENT 
PUMP, 
The writer of the present article is in- 
duced to invite attention to the patent 
pump, which is the subject of it, because he 
has himself had personal experience of its 
superiority over other pumps, and believes he 
will be doing a service, both to the ingenious 
patentees and to the public, by making its 
merits more generally known. 
The construction of the pump, as will be 
seen from the prefixed engravings, is remark- 
able for its simplicity. A perspective, and in 
part transparent, view of it is given in fig. 1. 
A is the working chamber ; B the suction- 
pipe; D E F the valve-box, staple, and 
spear ; G g the pump-rod ; H h the stay for 
pump-rod ; I P L the stauncheon ; K k step 
to receive the stauncheon ; M m plate for 
step of the stauncheon ; N pump-handle. 
Figs. 2, 3, 4, and 5, are detached views of the 
valve-box, staple, and spear ; fig. 2 exhibit- 
ing the valve shut, fig. 3 the same open. Fig. 
6 is the step, and fig. 7 the plate for the step 
of the stauncheon. Fig, 8 represents a cistern- 
head with flanch and nosle. 
The point to be particularly noted, in the 
construction of this pump, is the peculiar 
position of the suction-pipe B. Instead of 
being situated under the centie of the barrel, 
as in other pumps, it is fixed on one side ; 
which not only admits of its being much 
larger in tho bore than usual, but leaves that 
bore completely open and unobstructed. In 
the suction-pipes of the pumps in common 
use the bore is always less at the end attached 
to the barrel than at the lower end, in conse- 
