tube 
A spot like which, perhaps, 
Astronomer in the sun's lucent orb 
Through his glazed optic tube yet never saw. 
Milton, I'. L., iii. 590. 
Philosophic tube, 
That brings the planets home into the eye 
Of Observation. Cou-per, Task, iii. 229. 
7. The barrel of a chain-pump. 8. A small re- 
ceptacle of drawn lead, of approximately tubu- 
lar form, closed at the bottom by bending it 
over twice or three times on itself, and having 
a 'screw-cap" at" the" top, used to hold pigments th ? a<1 J e 
or similar matter in a semifluid condition. 
Auricular tube. See auricular. Bellini's tubes, the 
excretory tubes of the kidneys, opening on the papilla. 
Bowman's corneal tubes. See corneal. Bronchial 
tubes See bronchial. Capillary, cardiac, cerebro- 
meduUary, conarial tube. See the adjectives. Cir- 
culating tubes, tubes placed in steam-generators to af- 
ford or establish a circulation of the water. Conversa- 
tion-tube. See conversation. Dentinal, detonatingj 
tubercle 
by compressing the conducting material in the case of a tube-germination (tub'jer-nri-na"shon), w. In 
powder. Respiratory bronchial tube. Same as lobu- j 0< tue germination of a spore which first pro- 
lar bronchial tube.- Respiratory tube. See /w?ra- <juces a germ-tube. 
Tesrtub" Va ^e t tof? /- P To"1fceilian%ube ra ''see tube-hearted (tub'har"ted), a. Having a sim- 
TomeelKuii Trachea! tube, the trachea or windpipe. pl e tubular heart: specifying the Leptocarma. 
See trachea. Tracheotomy-tube. See tracheotomy.- tube-machine (tub'ma-shen"), A machine 
b^^mmberiuf Unes'of' fore J""TI'K' t '^electric; f oriel's for making tubes or pipes ; a tube-drawing ma- 
constant across any section of a tube of force. Tube Of chine. 
safety same assa/ety-fM&c.-Tubesof Ferrein. Same tube-nosed (tub'nozd), rt. Having tubular n os- 
&stubulioSFerrein. Uterine tubes, the Fallopian tubes. t r ii gj as a petrel ; tubinarial. See Tubinares. 
See Fallopian and eru8. Visceral, vocal tube.^ See fcn i ul . m | ll t A ^ t ( l i,/ I ,i5, t i. B . j n steam-boilers, same 
. ann. , , 
diffusion tube. See the qualifying words. -Esophageal tube-bearing (tub'bar"mg), a. Inentom. 
tube. Sameas(onacA-u6e. Eustachian, Fallopian, Hferous: specifically noting the Tubulifera. 
. 
apparatus in which light is produced by an electric dis- 
charge through rarefied gases. It is used with the indue- 
tion-coil, and consists of a sealed tube with platinum con- 
nections at each end, through which the electric spark is 
transmitted. The color and intensity of the light depend . , 
upon the nature of the gas with which the tube is charged, tube- 
Impregnating-tube. See impregnate. Intubation 
tube a short hollow cylinder of peculiar shape, having a 
flange at its upper extremity, which is inserted between 
_ ing- tube-plate (tub'plat), M 
lube~"d'fainaije-tube, stomach-tube, test-tube, vacuum-tube.) as flue-plate, 
tube (tub), r. t. ; pret. and pp. tubed, ppr. tub- tube-plug (tub'plug), n. In locomotive engines, 
ing. [< tube, .] 1. To furnish with a tube or a plug for driving into the end of tubes when 
tubes. 2. To receive or inclose in a tube. burst by the steam. 
A recent improvement in the spinner tubes the yarn, tube-ppuch (tub'pouch), n. A pouch for hold- 
rendering it smoother and more even than any process jug priming-tubes. 
yet devised, leaving little to be desired in the manufac- tuber (tu'ber), . [< L. tuber, a bump, swelling, 
tureofrope. Luce, Seamanship, p. 598. V kno b on plants, truffle, etc.; perhaps 
< / tn in tumere, swell. Hence ult. prob. truffle.'] 
vuwt*. " . i Aiv^ v . ~jp ^ e> - 1. In bot., a subterranean body, usually of an 
lfettnoSft l S^ t ^!^ n J^S?5?|!tS?rtSm*; tube-board (tub'bord), n. See the quotation, oblong or rounded form, consisting moipho- 
SSSSf^&ttatataKlftM tublt The channels, the resonators above the reeds, are not logically of a stolon-like branch of a rhizome, 
varied in size or shape [in the American reed-organ] as In 
the harmonium ; they exactly correspond with the reeds, 
and are collectively known as the tube-board. 
Encyc. Brit., XI. 483. 
(tub'bre"THer), n. Any animal 
which breathes through tubes, tracheae, or spir- 
acles; a tracheate, as an insect: distinguished 
from gill-breather. 
hrcroup.-LaVyngVal" tube", a'sTiort hollow cylinder of tube-brush (tub'brush), n. A cylindrical or 
special form, usedin intubation of the larynx. Latlcif- spiral wire brush used to clean the flues of a 
erous tubes. Seelatidferous. Letter's tube or coil, steam-boiler. 
a long flexible ^tube j"^^ 1 ^^^ 8 ^"^"^,^ tube-Casts (tub'kasts), n. pi. Minute cylinders 
to now'in order toTifisVortower the temperature of the found in the urine in certain forms of Bright's 
disease. They are formed in the tubules of 
the kidneys. See renal cast, under cast 1 . 
rt Lightning-tube Same as fulgurite. Lobular 
.chial tube, Malpighian tubes, medullary tube. 
part.- 
bron 
See lobular, Malpighian, medullary. i"v~- 1" _!, ~~/+iVh'L-l Inmn fnr 
Milk-testing tubes, a form of lac- tube-Clamp (tul klamp), n. i. A cia 
tometer containing anumber of tubes 
graduated alike, in which different 
samples of milk can be put for com- 
parison under identical conditions. 
- Muscular, nasal, pericentral 
tube. See the adjectives. Pitot's jawsH 
having a bail in which the tackle-hook engages. 
. 
tube, in hydraulics, an instrument 
for ascertaining the velocity of water 
Pilot's Tube. 
A, tube; B, line to 
which water is raised 
by the force of the cur- 
rent. 
engaging by compression and frictional con- 
tact the outer surface of a tube or pipe. Also 
tube-clip. 2. In well-boring, a tool for lifting 
well-tubing and drawing it up. It consists of two 
aws which can be clamped securely on the tube, each jaw 
laving a bail in which the tackle-hook engages. E. H. 
Knight. 
in rivers, etc. fa current-meter. It tube-cleaner (tub'kle"ner), . An instrument 
consists in its simplest form of a bent f or scraping or brushing out the interiors of 
glass ' u ^ lc ^' a ^jjj e j. 8 t ka t 'f J" OW er tubes, as a steel brush, a combination of steel 
"i?dYs"ior'izon* a^Tn'ofopposed to the springs arranged spirally about an axis, etc. 
direction of the flowing water. In tube-clip (tub 'klip), n. 1. A form of tongs 
consequence of the momentum of the usec l fty chemists, etc. , for holding heated tubes 
the^ube""^-'* 'height *i TroporUoi" or similar objects. E. H. Knight. 2. Same as 
al to the velocity of the stream. tube-clamp, 1. 
Pneumatic despatch tube. See tube-cock (tub'kok), n. A cock consisting of a 
pneumatic. Pneumatic tube, a UOi; i e withm which is inserted an india-rubber 
chandis^or m^ssages P as telegrap'hi'c tuDe wit h a screw-valve to compress it when 
despatches or items of news inclosed in suitable boxes, are the opening is to be closed, 
rapidly transmitted from one point to another by means tube-colors (tub'kul"orz), n. pi. See color. 
tube-compass (tub'kum"pas), n. A draftsmen's 
compass, having tubular legs containing slid- 
ing extension-pieces adjustable to any required 
length by means of set-screws. 
tube-coral (tub'kor'al), . Tubipore. 
tube-cutter (tub'kut'er), . A tool for cutting 
metallic tubes. The usual forms have a jaw to 
grasp the pipe, and an adjustable rotary cutter. 
E. H. Knight. 
tube-door (tub 'dor), n. In a steam-engine, a 
door in the outer plate of a smoke-chamber, af- 
fording access to the tubes for examination and 
cleaning. E. H. Knight. 
tube-drawing (tub'dra"ing), n. The forming 
of tubes by drawing them down from thick 
cylinders. 
tube-ferrule (tub'fer"il), n. In a steam-boiler, 
over the end of a tube between the tube and the 
tube-sheet which supports the end, for the pur- 
pose of securing the parts firmly together by 
wedging. K. H. Knight. 
chamber with 
The rhizome otKfifia Dandelion, showing 
the tubers, T, at the end of the long stolons, 
, and one larger tuber from wnich the 
plant has been developed ; C, stem, under- 
ground ; R, roots. 
of air-pressure. 
The difference of 
pressure neces- 
sary to effect the 
desired move- 
ment may be pro- 
duced by forcing 
air in behind the 
carrier-box, after 
placing the lat- 
ter in the tube, 
or by exhaust- 
ing air from the 
space in front; or 
both these meth- 
ods may be em- 
ployed. Postal 
tube, pyloric 
tube, receiv- 
ing tubes of 
the kidney. See 
the qualifying 
words. Rectal 
tube, an elastic 
rubber tube in- 
troduced into the 
rectum to give 
exit to the intes- 
tinal gases, or to 
facilitate the giv- 
ing of enemata. 
Resistance - 
tube, in elect. , a 
tube containing 
powdered car- 
bon, water, or 
other conduct- 
ing material 
used for intro- 
ducing resist- 
anceinto an elec- 
tric circuit. The 
resistance is usu- 
ally made adjust- 
able either by 
changing the dis- 
tance between 
the terminal 
plates in the 
case of a fluid, or 
much thick- 
ened, common- 
ly at the end, 
and beset with 
"eyes," which 
are properly 
modified axil- 
lary buds. Some 
of these buds nor- 
mally sprout the 
second season, 
giving rise to a 
new plant, for the 
nourishment- of 
which the tuber 
is richly stored 
with starch. Typi- 
cal examples are 
the common po- 
tato and the Jeru- 
salem artichoke 
(see Helianthus, 
with cut) ; less 
familiar are the 
tubers of the dwarf dandelion (Krigia Dandelion), the 
American gronnd-nnt(Jjn'o tuberosa\ and the ground nut 
of Great Britain, Canopo- 
dium denudatum (llu- 
nium Jleruosum). Monil- 
iform tubers occur, as in 
Eqwseimn Jtumattte (see 
moniUform) and Hydro- 
cotyle Americana (see 
Bydrocotyle). Strictly, 
the tuber is to be distin- 
guished from the tuber- 
cle (see tubercle (d) (3)) 
and the tuberous root 
(see tuberous); but the term often embraces these, espe- 
cially the former. 
2. [cop.] [NL.] A genus of subterranean dis- 
comycetous fungi, the truffles, having the perid- 
ium warty or tubercled, without definite base, 
the asci ovoid or globose, and one- to three- 
or (rarely) four-spored. About 50 species are 
known. T. sestivum is the common truffle. See 
truffle (with cut). 3. In pathol., anat., and 
zool., some rounded swelling part; a tuberosity; 
a tubercle ; a knot or swelling which is not the 
result of disease : used chiefly as a Latin word 
(with Latin plural tubera).- Olfactory tuber. 
Same as caruncula mammillaris (which see, under carun- 
cula). Tuber annulare, the annular tuber of the brain ; 
the pons Varolii. Tuber calcis, the tuberosity of the cal- 
caneum ; the backward projection of the bone of the heel. 
Tuber cinereum, a conical projection from- the lower 
part of the cerebrum, just behind the optic chiasma and 
in front of the corpora albicantia. Tuber cochlese, the 
promontory of the tympanum. See promontory, 2 (). 
Tuber ischii. See ischimn. Tuber radii, the tuberosity 
of the radius, for the attachment of the biceps. 
Tuberaceae (tu-be-ra'se-e), n. pi. [NL., < L. 
tuber, a tuber, + "-acesel~\ An order of hypoge- 
nous or subepigenous discomyeetous fungi, 
typified by the genus Tuber, having the gleba 
traversed by veins, and one- to ^ ^ 
eight-spored asci. 
Tuber of Potato (Salanntn 
tubcrosum). 
Pneumatic Tubes. 
, one of the exhaust-pipes connectin 
tube-filter (tub'fiFter), n. A ^ ^_ o ^^ _ = ^ 
porous or perforated walls, placed at the bot- tuberated7tu"'be'-ra-ted), a. [< 
torn of a driven well-tube or a pump suction- LL.iwfteratos, covered with knots 
tube, to exclude gravel and other foreign mat- orl j OS ges (< L. tuber, a knob, boss : 
tube-flower (tub'flou"er), n. An ornamental 
shrub. Clerodendron Siphonanthus, native in the 
East Indies, widelv cultivated in the tropics. 
It is an erect plant with few straight branches, and bears 
panicled white flowers with a very long curving corolla- 
tube (whence the name). 
. In a furnace, a tube 
, .. r _, ig ex- 
haust-fan apparatus with series of transmitting 
boxes of central station, one of which is shown 
in section at f; &, valve; r, different style of 4-iiltp flllA (tiili'flr^ 
valve;^.valveclosed;<>-,win<lowmtopofbu.x; D ^^' 
>, perforated screen covering entrance to a; f , through Which flame paSSBS. Ci. H. Knight. 
J, transmittins<-tubes ; h, single office-box con- *,,>. fnr\+ ftfili'tVit \ t, nl tiihp feei ( f Arl Ollp 
ti=,i.,., ,f two compartments, !. for sending, tUDC-IOOt (tUD lUt), II. , pi. tUOC-Jeel 1,-ietJ. U116 
of the numerous tubular locomotory pedicels of 
the ambulacra of echinoderms, as star-fishes 
and sea-urchins ; a water-foot. 
(tub'tdrm), a. Same as t aliform. 
, . 
messages, separated 
messages are received through tubes n. 
see tuber), + -erf 2 .] In her., hav- 
ing a rounded projection, or more 
than one. A serpent tubenttcil 
is tied in a knot or a close coil 
near the middle of the body, 
tubercle (tu'ber-kl), n. [< OF. tubercle, F. tuber- 
i-iilr = Sp. lulx'rculo = Pg. It. tuberculo, < L. 
tuberculum, a small swelling, a pimple, tubercle, 
dim. of tuber, a swelling : see tuber.'] A little 
tuber, or tubercule ; a small tuberosity ; espe- 
cially, a small projection of a bone, for the at- 
tachment of a ligament or tendon, as of the 
femur, hyoid, scaphoid, ulna, tibia, zygoma, 
