press-mark 
fly-leaf, indicating its location in the librarv 
Thus, the prcss-mark "A, 8, 10 " means "press A, shelf's, 
tenth volume In order on the shelf." There are many sys- 
terns of press marking. 
press-mark (pres'mark), r. t. and i. To place 
a press-mark on ; also, to use press-marks, 
press-master (pres'mas'ter), n. The officer in 
command of a press-gang. 
Are not our sailors paid and encouraged to that degree 
that there U hardly any need of press-matters f 
Tom Broien, Works, IV. 123. (l)aries.) 
press-money (pres'raun'i), . Same as prext- 
money. 
This kiss shall lie as good as press-money, to bind me to 
your service. Shirley, Maid's Revenge, 11. 1. 
pressnesst (pres'nes), H. [< 'press, a. (see itress- 
ly), + -MW.J The state of being pressed; close- 
ness; compression ; condensation of thought or 
language ; terseness. 
An excellent critic of our own commends Bolleau's close, 
ness, or, as he calls it. pnsmes*. 
Young, Love of Fame, Pref. 
pressOUTt, ". An obsolete form of presser. I'iers 
I'loirmau (A), v. 1'27. 
press-pack (pres'pak), r. t. To compress by a 
liydrauhc or other press : as, to press-pnek bales 
of soft goods. 
press-pile (pres'pil), H . A pile or kench of fish. 
[Canada.] 
4709 
3. The action of moral force : exertion of au- 
thority or influence ; compulsion ; a constrain- 
ing influence or impulse. 
.J!lfiw' b f ec0on ' ' :.,?*.. ' ' "'her ><> 'he Intemper 
ate talk of an angry child Uian pressuresot reason or prob- 
Jtr. Taylor, Works (ed. 18S5X II. 2fiti. 
nTk 118 C . onvoc t l . which umler the Influence of Arch. 
bishop Bourchier was more amenable to royal pressure 
was made to bestow a tenth in the following April. 
Stubbs, Const. Hist) I SSB. 
I he Preacher's contemporary, too, Malachi, felt the pres- 
nirent the same circumstances, had the same occasions of 
despondency. M. Arnold, Literature and Dogma, II. 
4. Weight upon the mind; burdensomenes*- 
oppressiveness; also, burden; oppression. 
Companions In grief sometimes diminish 
And make tha pressure easy. 
Fletcher and Shirley, Night- Walker, Iv. 0. 
My own and my people's pressures are grievous 
KUron Hasililce. 
The rulers augmented at the same time those public 
burdens the pressure of which Is generally the immediate 
cause of revolutions. Macaulay, Mlrabeau. 
Days of difficulty and pressure. Tennyson, Enoch Arden. 
5. Urgency; demand on one's time or energies- 
need for prompt or decisive action : as, the pres- 
sure of business. 
prest 
piston, whose opposite extremity Is armed with a pyraml- 
dal or circular cutter, as In the Rodman gage- /conteJ 
eswtty with a continuous spiral thread on Ititaterlw su7- 
face. a. In the Woodbrldge pressure gmge ; or M anVll-head 
to compress a copper cylinder, as In the English "crush- 
Pressure-gage. 
The fish are put In n pre ts-pilr. In which they remain a 
week or more to sweat. Perky. 
press-pin (pres'pin), M. In lM>filcbiiitliH(j, a bar 
of Iron used as a lever for standing-presses. 
Og-] 
press-plate (pres'pttt), n. One of a number of 
thin plates of sheet-iron which are placed be- 
tween press-boards in a standing-press, 
press-printing (pres'prin'ting), n. In errnm.. 
a variety of transfer-printing. 
There are two distinct methods of printing In use for 
china and earthenware : one is transferred on the bis,,,,,. 
and la the method by which the ordinary printed ware is 
produced, ami the other Is transferred on the glaze. The 
first is called prea-printinj and the latter bat-printing. 
L're, Met, III. oa>. 
press-proof (pres'prtif ), M. The last proof ex- 
amined before printed matter goes to press; the 
press-revise ; a careful proof taken on the press, 
as distinguished from 1111 ordinary rough proof 
press-room (pres'rOm), . 1. An apartment 
in winch presses for any purpose are kept. 
2 In printing, a room where printing-presses 
are worked, as distinguished from acomposinjr- 
room, etc. 
press-stone (pres'ston), n. The bed of a print- 
ing-press. /;. H. Kiiir/ht. 
pressurage (presh'ur-aj), . [< F. pressurai/c 
as pressure + -age. ] 1 . The juice of the grape 
extracted by the press. Imp. lHrt. 2. A fee 
paid to the owner of a wine-press for its use. 
Imp. ]>ict. 
pressural (presh'u-ral), n. [< pressure + -/.] 
Of the nature of mechanical pressure, 
pressure (presh'ur), . [< OF. pressure = Sp. 
prexura = It. presxurn, < L. pressura, a press- 
ing, a burilen, < premrre, pp. presxiix, press: see 
JWWM.J I. The act of pressing; the exertion 
of torce by pressing; the state of being pressed. 
In my thoughts with scarce a sigh 
I take the pressure of thine hand. 
Tennyson, In Memoriam, cxix. 
2. In lurch.: (a) An equilibrated force. 
Experience . . . showed that the pressures of a vault 
cannot he concentrated upon any single point, hut only 
upon a line which extends over a considerable portion of 
the pier from the springing point upwards. 
C. H. Moore, (iothic Architecture, p. 81. 
(6) A force per unit area exerted over tho sur- 
face of a body or part of a body, and toward the 
interior of t he body. A force exerted upon a surface is 
necessari y equilibrated ; otherwise, since line surface has 
no mass, It would produce Infinite velocity until equilib- 
rium ensued A pressure can produce no motion, because 
i state of equilibrium ; but a continuous variation of 
pressure in a given direction will tend to produce motion 
toward the places of less pressure. Thus, if a cylinder , ,f 
liquid In a tube is under greater pressure per square inch 
at one end than at the other, there will be a tendency U) 
motion toward the end where the pressure Is less. ( f ) 
stress iii general, being either thrust, pull, or 
shearing stress. For axis of presxiin: <-<>,,jii- 
gate prrmtnrr. and other phrases where pressure 
means at rex*, see the hitter word. 
Boyle discovered a law alwut the dependence of the 
pressure of a gas upon its volume, which showed that If 
you squeeze a gas into a smaller place It will press so 
much the more as the space lus 1.,-cii diminished 
H". K. Clifford, Lectures, I. 180. 
I'nlform presmm, . . . such as the atmospheric, and, in 
a less degree that of our bodily parts and of our clothes, 
produces no distinct consciousness. 
J - Sully, Sensation and Intuition, p. 80. 
A. Dobson, Int. to Steele, p. xlvl. 
6. Impression: stamp; character impressed. 
Ill wipe away . . 
All saws of books, all forms, all pressures past. 
Shak., Hamlet, I. . 100. 
Absolute pressure. See absolute. Absolute steam 
pressure, the total pressure computed from the zero of 
an absolute vacuum : distinguished from relatice prrmirr 
or from pressure indicated In pounds, kilograms, or other 
measiireof weight above theordlnary atmospheric pressure 
at the sca-level. Ordinary steam gages indicate pressure 
above that of the atmosphere. To the pressure so Indi- 
cated the pressure of the atmosphere must Iw added to 
obtain the absolute steam pressure. Atmospheric pres- 
sure, see atmosjthere, . center of pressure () in 
uAyrfM, that point of a body at which the whole amount 
of pressure may be applied with the same effect It would 
producelf distributed, (ft) Specifically, In Ayrfron. that point 
of a plane, or of the side of a vessel containing a liquid to 
which If u force were applied equal to the total pressure 
and in the opposite direction, It would exactly balance the 
total pressure.- High pressure, (a) Formerly, a phrase 
noting all steam engines working at pressures materially 
higher than atmospheric pressure, but now merely a rela- 
tive term. See too* pressure. () Figuratively, a high de- 
gree of mental tension. 
Miss Squeers ... was ... taken with one or two 
chokes and catehlngs of breath, indicative of feelings at a 
layh premrre. Difkrns, Nicholas Nlckleby, ill. 
Intensity of a pressure. See intensity. low pres- 
sure, In steam-engines, a phrase noting a motor using 
steam at :. comparatively small pressure. The precise 
signification of the term ls undetermined, but the stan- 
dard of pressure Is steadily rising, so that englnea that 
were formerly considered nlgh-pressure are now looked 
upon as low-pressure engines. The phrase formerly Im- 
plleil the presence of a condenser and pressure of not 
more than six pounds above atmospheric pressure, but it 
now has reference solely to the pressure, and describes 
that only relatively. Pressure myelitis, myelitis due to 
compression of tho spinal cord, as by a tumor. Pressure 
of atmosphere. See atmosphere, 2. 
pressure-bar (presh'ur-bar), ii. In a planing- 
machine, a device for holding down lumber to 
be planed. K. H. Knii/ht. 
pressure-blower (presli'ur-blo'er), . Ablower 
in which a blast is produced by the direct pres- 
sure of pistons upon a definite and confined 
quantity of air, in contradistinction to the fan- 
hliiircr, which produces a blast, by centrifugal 
action. 
pressure-figure (presh'ur-fig'ur), w. In Mt- 
eral., a figure produced iu a section of some 
minerals by the pressure of a rather sharp 
point : thus, upon a sheet of mica the pressure- 
figure has the form of a six-rayed star, which is 
diagonal in position to the more easily obtained 
percussion-figure that is, its rays a're normal 
to edges of the prism and clinopi'nacoid. 
pressure-filter (presh'ur-fil'ter), . A filter in 
which the liquid to be filtered is forced through 
filtering material by pressure greater than that 
"/ .L tS ., OWn we 'K ht "I the filter. Positive increase 
01 the difference between the pressure on the liquid sur- 
face and against the discharge outlet is effected either by 
forcing air intoan inclosed space over tin-liquid, by Increas- 
ing the head through use of a standpipe, or by decreasing 
the atmospheric pressure upon the discharge outlet 
pressure-forging tpresh'ur-for'jing), w. A 
method of shaping metal iii dies in a forging- 
press by means of great pressure, usually hy- 
draulic; hydraulic forging. 
pressure-gage uv>d''i--gaj), ,,. i An appa- 
r.-itus or Mtaohment forindicating the pressure 
of steam in a boiler. 52. In </.. an instru- 
ment used to determine the pressure of pow- 
der-gas per square unit of area in the bore or 
chamber of a gun. The gas acts upon one end of a 
a, piBon; /. housing; , icrew.pliig which clam the housing f 
er" gage. With the two cntter-gages. the lengths of the 
Indentations In the soft copper disks are measured and 
compared wl I, cuts of the same length made In the test' 
Ing machine by the same cutters. From the tests In the 
machine, a table of lengths of cuts, with the pressures re- 
quired to produce them, Is made up. Hence, measuring 
the Indentation In the disk taken from the pressure KX<- 
and turning to this table, the pressure exerted by thopow. 
der in the Ix.re of the gun will l w found opposite the mea- 
sured length. The disks used In the presiirc.gnge and In 
the testing-machine should be taken from the same bar 
of copper. In order to secure a uniform density. In the 
crasher gage, the diminution in length of the copper 
cylinder is measured, and the pressure found by the test- 
Ing-machine to produce an equal reduction In length ,,f 
a cylinder from the same copper Is assumed to be that 
exerted upon the bore of the gun. ITessure gages may 
be placed either In a cavity In the walls of a gun or in the 
f the cartrldge-bag carrying the charge of powder, 
pressure-note (presh'ur-not), . In </,/>, a note 
with a short crescendo upon it, as f>, indicat- 
ing a tone which is to be pressed into loiidness 
as soon as sounded. 
pressure-register (presh'ur-rej'is-ter), H. An 
instrument which indicates and records the 
fluctuations of pressure of a fluid body, par- 
ticularly an elastic fluid, as air, steam, or illn- 
minating-gas. See recording xtenni-naije, under 
steam-gage, 
pressure-screw (presh'ur-skrii), M. In ord- 
nance, a screw used to h'old parts in position 
by pressure. It is the analogue of the set-screw 
m general mechanism. See set-xcrcv. 
pressure-spot (presh'ur-spot), . One of nu- 
merous minute spots or areas on the surface 
of the body, in which it appears from experi- 
mentation that the proper sensations of pres- 
sure reside, this sensation not being excitable 
in the intervening spaces. 
The finest point, when It tenches a prfssure-spat, pro- 
duces a sensation of pressure, snd not one at being 
O. T. ladd, Physlol. Psychology, p. 410 
presswork (pres'werk), w. 1. The working or 
managementof a printing-press; also.any other 
work of a press-room relating to ink or impres- 
sion on a press: in opposition to composition. 
or that branch of printing which is confined to 
preparing types for the press. 2. In joinery, 
cabinet-work of a number of successive veneers 
crossing grain, and united by glue, heat and 
pressure. E. H. Knight. 
press-yeast (pres'yest), . See yeast. 
prest 1 (prest). An occasional preterit and past 
participle of press*. 
prest-'t (prest), r. t. [< OF. prester, F. preHjr, 
lend, ascribe, attribute, give rise to, afford, = 
Pr. Sp. Pg. prestar = It. prestare, < L. priestare, 
stand before, be surety for, execute, fulfil, dis- 
charge, < prs, before, + stare , stand : see state. 
Cf. reafS.J To furnish ; pay out ; put out as a 
loan; lend. 
To have prtsted and lent money to Kynge Henry for 
the arrayenge and settynge forth of a new aimye again.l 
" Hall, Edw. IV.,7n. 10. 
, i , have P<<*." roe the Earl to Rorghley 
above SOOOJ. among our men here since I came and vet 
what need they be In ... all the world doth see " 
Motley, Hist Netherlands, I. 5SS. 
prest- (prest), H. [< OF. prext. F. prft (= Pr 
/>/ = It. /,*>), a loan, < OK. pn-xl, r, lend- 
s.-e wwM>, r.] If. A loan of money; hence, a 
loan in general ; also, ready money. 
The snmine of expenses, as well of wages A presto u 
for the expenses of Oie kings houses. 
HaHityft Voyage,, I. m. 
