I lifted the heavy wood beam that crossed their door, securing it.
The beam was swallowed by the catacombs, and it was still too dark around her to see how large the underground world was.
What is required is some means for localizing and directing a beam of radiation.
The beam of light extinguished and she felt around with trembling hands until she located the flashlight.
It is struck by a wooden beam swung on the outside, and only at the changes of the night-watches, when its deep tone may be heard in all parts of the city.
Deflections of the suspended needle are indicated by the movement of a narrow beam of light which the mirror reflects from a lamp and focusses upon a graduated cardboard scale placed at a distance of a few feet; the angular deflection of the beam of light is, of course, twice that of the needle.
In the autumn of 1786 there was an encounter near the village of East Lee between about 250 adherents of Daniel Shays (many of them from Lee township) and a body of state troops under General John Paterson, wherein the Shays contingent paraded a bogus cannon (made of a yarn beam) with such effect that the state troops fled.
I love to weigh, to settle, to gravitate toward that which most strongly and rightfully attracts me--not hang by the beam of the scale and try to weigh less--not suppose a case, but take the case that is; to travel the only path I can, and that on which no power can resist me.
Conceive a beam of plane polarized light to move among a number of particles, all small compared with any of the wavelengths.
In either case (as also with a prism) the position of minimum deviation leaves the width of the beam unaltered, i.e.
The screen might be separate from the rood beam or rood loft.
- Beam; Gascogne (Basse-Navarre, Soule, Labord).
12039 of 1896) brought forward the idea of focusing a beam of electric radiation for telegraphic purposes on a distant station by means of parabolic mirrors, and tried this method successfully on Salisbury Plain up to a distance of about a couple of miles.
Leaves respond in another way to the same influence, placing themselves across the path of the beam of light.
We may now investigate the mathematical expression for the disturbance propagated in any direction from a small particle upon which a beam of light strikes.
"Cat" or "cat-head," in nautical usage, is the projecting beam on the bows of a ship used to clear the anchor from the sides of the vessel when weighed.
An ebonite beam B is rocked up and down rapidly by a train of mechanism, and moves the cranks FIG.
The first part will be, as before, zinc to the line; at the next half stroke of the beam M will not pass through, as there is no hole in the paper; but at the third half stroke it passes through and copper is put to the line.
If a solution of the pigment is placed in the path of a beam of light which is then allowed to fall on a prism, the resulting spectrum will be found to be modified.
This coloring matter, as shown by its absorption spectrum, picks out of the ordinary beam of light a large proportion of its red and blue rays, together with some of the green and yellow.
It is said that Eleazar, the priest who guarded the treasure, offered Crassus the golden beam as ransom for the whole, knowing, what no one else knew, that it was mainly composed of wood.
Teeth of radula beam-like, and at most three marginal teeth on each side.
The samson-post, which supports the walking beam, and the jack-posts, are dove-tailed and keyed into the sills.
The samson-post is placed flush with one side of the main sill, the band-wheel jack-post being flush with the other side, so that the walking-beam, which imparts motion to the string of tools, works parallel with the main sill.
The engine, which is provided with reversing gear, is of 12 or 15 horse-power and motion is communicated through a belt to the band-wheel, which operates the walking-beam by means of a crank.
The headache-post is a vertical wooden beam placed on the main sill directly below the walking-beam, to receive the weight of the latter in case of breakage of connexions.
The band-wheel communicates motion to the walking-beam, while drilling is in progress, through the crank and a connectingrod known as the pitman; to the bull-wheels, while the tools are being raised, by the bull-rope; and to the sand-pump reel, by a friction pulley, while the sand-pump is being used.
If now the vertical movement of the walking-beam be 24 in., when 'it starts on the up-stroke the sinker-bar rises 4 in., and the cross-heads come together with a smart blow, then the auger-stem is picked up and lifted 20 in.
The temper-screw forms the connecting link between the walking-beam and cable, and it is ' let out ' gradually to regulate the play of the jars as fast as the drill penetrates.
If the cardboard scale upon which the beam of light is reflected by the magnetometer mirror is a flat one, the deflections as indicated by the movement of the spot of light are related to the actual deflections of the needle in the ratio of tan 20 to 0.
The cardboard scale SS is placed above a wooden screen, having in it a narrow vertical slit which permits a beam of light from the lamp L to reach the mirror of the magnetometer M, whence it is reflected upon the scale.
The first would correspond to a general turning of the beam; and the second would imply imperfect focusing of the central parts.
Hence a wide beam demands treatment with further apparatus (usually a telescope) of high magnifying power.
If x and y be co-ordinates in the plane of the wave-surface, the axis of y being parallel to the lines of the grating, and the origin corresponding to the centre of the beam, we may take as an approximate equation to the wave-surface -- -} z =+Bxy 2, +ax 3 13x2 2pp p y+-yxy2-?-Sy3+..