TUE NEW JOINT.
Another note from a practical man shows the interest taken in the newly-invented joint.
Ambleside, Nov. 7.
' Stn—In your invaluable paper I was much interested in the account you gave of Mr. Hine's new joint. Its application to fancy boxes would be much improved by substituting a mitre in the external angle, instead of showing the ends of the sides. Either in solid work Cr veneered it would be an ativantage. In solid, it is obvious. In veneering it is well known that end way does not hold the veneer equal to the side surface. It may be described thus :—Draw a square in sixteen parts or checks, number the chocks beginning at the left hand of the top line, and so on. From the outer angle of No. 4, draw a line at right angles to the inner angle of No. 4, darken the right-hand angle, and the numbers 6, 8, 9, 10, 11, 12, 14, 15, and 16.
If you think the above worth a corner of your paper you will much We would slightly amend the description of the diagram suggested by our correspondent. The square No. 4, which forms the outermost angle at the junction of the two boards or planks, should be bisected by a line from the upper external angle to the lower internal angle, the lower and right-hand half being blackened. The letter shows that our corre- spondent is fully alive to the adaptability of the new joint, but in point of fact the same modification of it had been shown to us in a box, by Mr. Hine. A diagram of another application has been brought to us showing how the new joint can be applied to the junctures of the permanent way for railways. Form a diagram of 16 squares as before, producing the top and bottom lines of the diagram on each aide, blacken the squares numbered 3, 4, 6, 7, 8, and 11, and the whole of the space between the two horizontal lines towards your right hand. The diagram will now represent a perpendicular and longitudinal section of the permanent way united by the joint. In order to prevent lateral shaking there are two rib-like risings across the joint along the middle of the two pieces united, and over this is placed a saddle which fits them and renders any lateral movement impossible. The two pieces are now united as firmly as if they 'were formed of one undivided metal.
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