S3 



General Notices, 



have found it of very great service ; being more quickly applied, and, 1 

 believe, more correct than the protractor ; especially if the person using the 

 latter should be not very particular in setting off the centre line, and the 

 degree of the angle which may he recjuired. My instrument is made very 

 neatly by Mr. Cook of Crown Court, Soho, from a model of my own con- 

 struction. I'^ig-T. n, the instrument, the longest side 2ft. long; b, the 

 edge of the instrument; c, the short leg, removed from the long leg; d, the 

 edge of the short leg; c, part of the long leg, showing the quadrant. 

 8 9 Fig. 7. a diagram showing the mode of 



using the instrument. Supposing it were 

 required to tlraw an angle of +j° from the 

 point/, on the line g h; place the short leg 

 parallel with the line, so that the long leg 

 touches the given point, then draw the 

 line if. If you require a perfect triangle, 

 turn the instrument over, and draw a line 

 along its side, anil the triangle will be com- 

 pleted; each side of the instrument being 

 alike in length, and perfectly flat. — D. D. 

 Necve. 6. Wyndham Street, JBri/atistone 

 Square, Aug. U. 1831. 



An improved Xumbering-Stick on the 

 Notch Principle. — Sir, If you think, with 

 me, that my notch numbering-stick is su- 

 perior to any thing of the kind now in 

 general use, you will not hesitate to make 

 it, through the medium of your Magazine, 

 more generally useful. It is equally as 

 simple and comprehensive as Seton's, and 

 the signs used are not so apt to be con- 

 founded with each other. I have adopted 

 three new signs, the 2, 3, and 4; from 

 which, with the J and 5 in common 

 use, I make all the others thus {fg. 

 8.):- 



A notch added to 1, on the left side, 

 at the top, makes 2 ; at the bottom, on 

 the right side, 3 ; and at top and bottom, 

 4. The 1 added to 5, and connected at 

 the top, makes 6 ; and in like manner, as 

 the notch is added to 1 to make 2, 3, and 

 4, so is it added to the 5 to make 7, 8, 

 and 9. — C. /.. B. Sept. 3. 1831. 



The above is certainly a great improve- 

 ment on Seton's mode, because there is 

 less new to learn in it, and consecjuently 

 it will be more easily remembered. The 

 great objections to all j)artially known 

 signs are, their liability to be forgotten by 

 those who use them, when they liave been 

 a very short time out of practice, and the 

 difficulty of setting a stranger to work 

 in a garden where such numbers are 

 used. A nurseryman who would use 

 Seton's mode of numbering for his fruit 

 trees, must either attend to every thing 

 connected with those numbers himself", 

 or be dependent on one or more inch- 



