United States or Cabo Verde ? Vote for the TOP Country of the Week !
A. In engines moving at a high rate of speed the roller will be thrown back from the cam by its momentum, unless it be kept against it by means of springs. In some cases I have employed a spring formed of a great number of discs of India rubber to keep the roller against the cam, but a few brass discs require to be interposed to prevent the India rubber discs from being worn in the central hole.
The sage-green walls were thickly hung with photographs, watercolors, charcoal sketches, miniatures, bits of faience, lacquered trays and discs, and great shining circles of Syrian and Benares metalwork.
The organs which produce this curious electrical effect are placed along the under side of the tail. They may be compared to a series of columns inclosed in a thin membrane packed closely together, which, consisting of a series of fiat discs, may be imitated by placing a number of coins with their discs parallel to each other, and with a bladder between each, separated by a gelatinous substance.
Every moment they increased in numbers, and pressed more urgently upon the discs of my ushers" Cavor does not explain what he means by this "every moment fresh shapes emerged from the shadows and forced themselves upon my astounded attention.
The "tree-frog," whose toes are terminated by rounded discs which assist it in climbing, possesses, in a high degree, the faculty of changing its hues; and one as green as a leaf to-day, will be found grey and spotted like the bark to-morrow.
The apparatus consisted of a telephone button placed between two discs of platinum and connected in circuit with the battery and a sensitive galvanometer. The strip was supported so that one end bore upon the button with a pressure which could be regulated by an adjustable screw at the other.
Lastly, the stem of B. capreolata twines imperfectly; the much-branched tendrils revolve in a capricious manner, and bend from the light to the dark; their hooked extremities, even whilst immature, crawl into crevices, and, when mature, seize any thin projecting point; in either case they develop adhesive discs, and these have the power of enveloping the finest fibres.
Inside each of the spaces there is a figure. On one side of each of the discs is written a number and on the other the name of the note. The child next arranged the discs in the notes cut out on the staff, but there are no longer numbers written to help him find the places. Instead, he must try to remember the place of the note on the staff.
These can certainly not have been cut without emery, and scarcely without such devices as rapidly revolving points, or discs, of the kind used by modern lapidaries. Though the devices are in general rude, the work is sometimes exceedingly delicate, and implies a complete mastery over tools and materials, as well as a good deal of artistic power.
"Bravo! quite sound," cried Uncle Richard. "Now the other." This proved also to have borne the journey well, and Tom looked from the two great discs to his uncle. "Well," said the latter; "do you see what these are for?" "To grind flour much finer?" "To grind grandmothers, boy! Nonsense! Not to grind, but to be ground. Out of those Tom, you and I have to make a speculum of tremendous power."
Word Of The Day