screen 
5420 
Back'tl with a ridge of hills, 
That amend the fruits of the earth. 
Milton, P. E., iv. 30. 
The Romans still he well did use, 
Still screen'd their Roguery. 
Prior, The Viceroy, st. 30. 
2. To sift or riddle by passing through ascreen: 
as, to screen coal.=Syn. 1. To defend, hide, mask, 
cloak, shroud. 
One who screens, in 
other purpose: as, a xcn-i-ii upon which images 
may be cast by a magic hinlcrii: in general, 
any shelter or means of concealment. 
Your leafy screens. Shak., Macbeth, v. 8. 1. 
There is ... great use of ambitious men in being 
screens to princes in matters of danger and envy. 
Bacon, Ambition. 
Mill Mincing, stand between me and his Wit 
Wit. Do, Mrs. Mincing, like a Skreen before a great Fire. sc reener (skre'uer), 11. 
Conyreve, Way of the World, ii. 4. e j tner 8ense . 
Specifically, in arch.: (o) An ornamental partition of wood, Engine men, bank hands, screeners, all wanted a rise, 
stone, or metal, usually so placed in a church or othe d iu t t it Tke Emjiwer, LXX. 259. 
build ing as to shut out an aisle from the choir, a private * v- /\ 
chapel I from a transept, the nave from the choir, the high screening-machine (skre'nmg-ma-shen'), n 
An apparatus having a rotary motion, used 
for screening or sifting coal, stamped ores, and 
the like. 
screenings (skre'ningz), n. pi. [Verbal n. of 
screen, v.] 1 . The refuse matter left after sift- 
ing coal, etc. 2. The small or defective grains 
of wheat separated by sifting. 
screes (skrez), n. pi. Same as scree*. 
screeve (skrev), v. [Prob. < Dan. skrire, write : 
see scribe.] To write or draw ; write a begging 
letter, etc. [Thieves' slang.] 
screever (skre'ver), M. [Prob. < Dan. skrirer, 
scribe, < skrire, write: see screere.] One who 
writes begging letters, or draws colored-chalk 
pictures on the pavements. [Thieves' slang.] 
The screevers, or Writers of Begging-letters and Peti- 
tions. Jtibtm-Turner, VagranU and Vagrancy, p. 649. 
scree ving (skre'ving), H. [Verbal n. of screeve, 
v., prob. < Dan. skrive, < L. scribere, write : see 
shrive.] Begging by means of letters, petitions, 
or the like ; writing false or exaggerated ac- 
counts of afflictions and privations, in order to 
receive charity; drawing or writing on the pave- 
ments with colored chalks. [Thieves' slang.] 
I then took to screening (writing on the stones). I got 
my head shaved, and a cloth tied round my Jaws, and 
wrote on the flags " Illness and Want," though I was never 
better in my life, and always had a good bellyfull be- 
fore I started of a morning. 
Mayhew, London Labour and London Poor, I. 461. 
screfet, An obsolete form of sheriff*. 
Scremerston crow. The hooded crow. 
altar from the east end, an altar-tomb from a public pas- gcrenet n, A Middle English form of screen. 
sage, or to fill any similar purpose. See perclose and cut screw l ( s kro), n. [Formerly also serve; = MD. 
under organ-screen, (b) In some medieval and similar ,*?:";, T/ \.., ir Lf .f.j-,2 schruve - MLG 
halls, a partition extending across the lower end, forming scltroele, Lt. scnroej, scruie, scnruve 
a lobby within the main entrance-doors, and having often schruve, LG. schruve, scnruwe = MHG. SChruoe, 
a gallery above, (c) An architecturally decorated wall (J. schraubc, G. dial, schrauf, scliraufen (cf. Euss. 
inclosing a courtyard or the like. Such a feature as the s)lch , trilpii < (J.) = Icel. skrufa = Sw. skruf = 
entire facade of a church may be considered ., ^screen ^ g & ^ ^^ ^^ . < ^ 
Screen. Lady Chapel of Gloucester Cathedral, England, 
looking toward the nave. 
when it does not correspond with the 
as is commonly the case in Italian and frequent iv-Eng- 
lish churches, but is merely a decorative mask for the 
building behind it. See cut under reredos. 
The screen of arches recently discovered in the h&tel of 
the Prefecture at Angers. 
J. Fergusson, Hist. Arch., I. 490. 
The western facade -. . . of Lincoln consists of a vast 
arcaded screen unbroken by upright divisions, with a level 
cornice terminating its multiplied horizontal lines. 
C. H. Moore, Gothic Architecture, p. 162. 
2. A kind of riddle or sieve. Especially (o) A 
sieve used by farmers for sifting earth or seeds. Other 
screens for grain and other substances are in the shape 
of cylinders, some having knockers or brushes as in a 
flour-bolt. See cuts under pearling-mitt. (&) A wire 
croue, escroe, escro, F. ecrou, the hole in which 
a screw turns, an internal screw, a nut; prob. 
< L. serobis, rarely scrobs, a ditch, trench, grave, 
in ML. used also of the holes or furrows made 
by rooting swine (cf. L. scrofa, a sow) : see scro- 
biculate, scrofula. The Teut. forms are all de- 
rived (through the LG.) from the OF., with 
change of sense, as in E., from ' internal screw' 
to 'external screw.' In defs. 5, 6, 7, etc., the 
noun is from the verb.] If. The hole in which 
a screw (in sense 2) turns. 2. A cylinder of 
wood or metal having a spiral ridge (the thread) 
winding round it, usually turning in a hollow 
sieve for sifting sand, gravel, etc. See sand-screen (with cylinder, in which a spiral channel is cut cor- 
cut). (c) In metal., a perforated plate of metal, used in responding to the ridge. These convex and concave 
the dressing of ores. The screens of a stamp-nidi are 8pira i 8 with their supports, are often called the CTW and 
placed in front of the mortars, and regulate the fineness to ^ and ^ the externa l or male screw and the internal or 
which the material has to be reduced before it can pass fa^fo smw respectively. The screw forms one of the six 
through, and thus escape further comminution, (a) An 
apparatus for sizing coal in a coal-breaker. Screens of 
oast-iron are used for the coarser sizes, and of woven wire 
for the very smallest (e) A device to prevent the passage 
of fish up a stream, made of common wire painted with tar, 
or strips of laths planed and nailed to a strong frame : em- 
ployed by fish-breeders. 
3. A large scarf forming a kind of plaid. 
[Scotch.] 
The want of the screen, which was drawn over the head 
like a veil, she supplied by a bongrace, as she called it : 
a large straw bonnet, like those worn by the English 
maidens when labouring in the fields. 
Scott, Heart of Mid-Lothian, xxviii. 
Folding screen, (a) A screen consisting of several leaves 
or flats hinged together in such a way that when they are 
opened at an angle the screen will stand firmly, (b) A 
screen supported on cross-mils, feet, or the like, enabling 
it to stand firmly, and with hinged flaps which when open- 
ed increase its width. Ladder-screens, coverings put 
underneath ladders on board ship to prevent the feet of 
those going up and down from being seen. The ladders 
when so covered are said to be dressed. Magazine- 
screen (natrf.), a curtain made of baize, flannel, or fear- 
naught, and having an aperture closed by aflap. In time 
of action, or when the magazine is open, this curtain is 
hung before the scuttle leading from the magazine, and 
the cartridges are passed through the aperture for distri- 
bution to the guns. Magnetic screen. See magnetic. 
Screen bulkhead. Sec tndkhead. 
screen (skreu), c. /. [Early mod. E. also ukrt'i-n : 
< screen, n.] 1. To shelter or protect from in- 
convenience, injury, danger, or observation ; 
cover; conceal. 
Samples of variously formed Screws used in Carriage-maktalf and 
Carpentry : a, 6, c, rf, t are special fonns of wood-screws in common 
use. 
mechanical powers, and is virtually a spiral inclined plane 
only, the inclined plane is commonly used to overcome 
gravity, while the screw is more often used to overcome 
some other resistance. Screws are right or left according 
to the direction of the spiral. They are used (1) for bal- 
ancing forces, as the jack-screw against gravity, the pro- 
peller-screw against the resistance of water, ordinary 
screws against friction in fastening pieces together, the 
screw-press against elasticity, etc. ; and (2) for magnify- 
ing a motion and rendering it easily manageable ami uira- 
snrable, as in the screw-feet of instruments, micrometer- 
screw 
screws, etc. For the pitch of a screw, seepitcftl, 7 (b). See 
also leading-seme, lereling-xcreit. 
3. A spiral shell; a screw-shell. 
His small private box was full of peg-tops, . . . screws, 
birds' eggs, etc. T. Hughes, Tom Brown at Rugby, i. 3. 
4. A screw propeller. 5. [Short for screw 
stunner.] A steam-vessel propelled by means 
of a screw propeller. 6. A small parcel of 
tobacco done up in paper with twisted ends, 
and usually sold for a penny. [Great Britain.] 
I never was admitted to offer them [cigars] in a parlour 
or tap-room ; that would have interfered with the order 
for screws (penny papers of tobacco). 
Mayhew, London Labour and London Poor, I. 494. 
7. A turn of a screw. 
Strained to the last screw he can bear. 
Cowper, Truth, 1. 386. 
8. A twist or turn to one side : as, to give a 
billiard-ball a screw by striking it low down or 
on one side with a sharp, sudden blow. Com- 
pare English, 5. 
The nice Management of ... [the beau's] Italian Snuff 
box, and the affected Screw of his Body, makes up a great 
Part of his Conversation. 
Quoted in Ashton's Social Life in Reign of Queen Anne, 
[1. 140. 
9. Pressure : usually with the. [Slang.] 
However, I will put the screw on them. They shall have 
nothing from me till they treat her better. 
H. Kinysley, Geoffry Hamlyn, xxvii. 
10. A professor or tutor who requires students 
to work hard, or who subjects them to strict ex- 
amination. [College slang, U. S.] 11. Wages 
or salary. [Slang.] 
He had wasted all his weekly screw, 
And was in debt some sixpences besides. 
Australian Printers' Keepsake. (Leland.) 
12. In math., a geometrical form resulting 
from the combination of an axis, or straight 
line given in position, with a pitch or linear 
magnitude Archimedean screw. See Archimedean. 
A screw loose, something defective or wrong, as with 
a scheme or an individuaL 
My uncle was confirmed in his original impression that 
something dark and mysterious was going forward, or, as 
he always said himself, "that there was a screw loose some- 
where." Dickens, Pickwick, xlix. 
Auxiliary screw, a screw propeller in a vessel having 
sail-power as her main reliance, generally so fitted that it 
can be hoisted clear of the water when not in use. See 
cut under banjo-frame. Auxiliary steering-screw, a 
secondary screw exerting its force at an angle with the 
plane of symmetry of a vessel, and used to increase a ves- 
sel's manageableness. Back-center screw. See back- 
cenler. Backlash of a screw. See backlash. Blake's 
screw, a screw-bolt having an eye in one end and a 
screw-thread cut in the other ; an eye-bolt. Compound , 
coreciprocal screw. See the adjectives. Differen- 
tial screw, an arrangement consisting of a male screw 
working in a female screw and having a female screw 
cut through its axis with a different pitch, a second male 
screw working in this. If the hollow screw is turned 
while the inner one is prevented from turning, the 
latter advances proportionally to the difference of the 
pitches. Double screw, a screw which has two consecu- 
tive spiral ridges or threads, both having the same pitch. 
Endless screw. See endless. Female screw. See/- 
male. Flat screw, a spiral 
groove cut in the face of a disk, 
which by its revolution com- 
municates a rectilinear mo- 
tion to a sliding bar carrying a 
pin which works in the groove. 
Fossil screw. See fossil 
and tcrewstone. Hindley's 
screw, a screw cut on a solid, 
of such form that if any plane 
be taken through its longitu- 
dinal axis, the intersections of 
the plane by the perimeter are 
arcs of the pitch-circle of a 
wheel into which the screw is 
intended to work. It is so 
named from having been first 
employed by Mr. Hindley of 
York in England. Hunter's 
screw [named from its inven- 
tor, Dr. John Hunter], adouble 
screw consisting of a princi- 
pal male screw that turns in a nut, but in the cylinder of 
which, concentric with its axis, is formed a female screw 
of different pitch that turns 
on a secondary but fixed male 
screw. The device furnishes 
a screw of slow but enormous 
lifting power without the ne- 
cessity of finely cut and conse- 
quently frail threads. Every- 
thing else being equal, the 
lifting power of this screw in- 
creases exactly as the differ- 
ence between the pitches of 
the principal male screw and 
the female screw diminishes, 
in accordance with the princi- 
ple of virtual velocities. In- 
terior screw. See interior. 
-Interrupted screw, i" 
mach., a screw part or parts 
of whose thread are cut away, 
rendering it discontinuous ; 
specifically, a screw whose 
exterior is divided into six 
Hindley's Screw. 
a, screw ; , toothed wheel 
meshing with a. When a turns 
as indicated by straight arrow, 
b turns as indicated by curved 
Hunter's Screw. 
