United States or Seychelles ? Vote for the TOP Country of the Week !
Very neat small bulbs may be made on tubing of a diameter of 3/16 inch or a little less, but the beginner is advised to start with tubing of about 1/4 inch diameter. First Method Making a Gas-washing Tube This first method can be used whenever one can work through an open end opposite to the end of the tube where the joint is to be made.
If you cannot find a piece of steel rod and brass tubing which fit close enough naturally, the only alternative is to rub down a rod, slightly too big to start with, until it will just move freely in the tube. This is a somewhat tedious business, but emery cloth will do it. The rod should be 3-3/8 inches, the tube 2-1/8 inches, long.
The piece of glass tubing projecting out through the cork is now cut off so as to leave an end about 1/2 inch long when the cork is firmly seated and the inner tube pushed into contact with the center of the end of the large tube, as shown in the drawing.
These toys, for such they must be considered, are very easy to make, and are "warranted to give satisfaction" if the following instructions are carried out. A Small Top. For the boiler use a piece of brass tubing 4 inches or so in diameter and 3 inches long.
Another way of cutting large tubing, especially if it has rather thick walls, is to make a scratch in the usual way, and then turn on the smallest and sharpest possible flame of the blast lamp. The tube is next taken in both hands and held horizontally above the flame so that the scratch is exactly over it.
Griffin's glass cutter, which contains a hardened steel wheel, like that on any ordinary window-glass cutter, and a device by which this can be made to make a true cut clear around the tube, is a very handy article, especially for large tubing, and may be obtained from any dealers in chemical apparatus.
The turbine just described can hardly be termed an efficient one, as the vanes, owing to their simple formation, are not shaped to give good results. We therefore offer to our readers a design for a small turbine of a superior character. The casing is, as in the preceding instance, made up of flat brass plates and a ring of tubing, and the bearings, BG1, BG2, of brass tube.
The end of this is then heated and blown off, and the piece is ready to be joined to another similar end, or to a piece of ordinary tubing if desired. The joints are best not blown too much, as thick walls shrink very slowly. Much may be done by gently pushing the tube together or pulling it apart in the flame, to remove lumps and irregularities.
Golden sovereigns, you see, carefully stacked up to fill the little tubing to its capacity and thousands of 'em done the same, too! There's a perfect fortune down there in that factory at Saltfleet! Mr. Narkom," he turned round and surveyed the Superintendent with mirthful eyes, "what about these bank robberies now, eh? I told you something would crop up. You see it has.
The nights began with a black heat; there were hours when the acrid air seemed to ferment for stagnation, and to burn the bronchial tubing; then, toward morning, it would grow chill with venomous vapors, with morbific dews, till the sun came up to lift the torpid moisture, and to fill the buildings with oven-glow.
Word Of The Day