Note BQ, to follow the first paragraph, page 889. (Mr. Michael Kelley's Quannett.) Mr. Michael Kelly's Quannett, represented in figs. 830 and.831, was rewarded by too Society of Arts in 1845; and the instrument baa been successively applied to scraping zinc plates for the process denominated Anastatic Printing, invented in Germany, and Patented in England by Mr. Joseph Woods. By this Ingenious art impressions may be made, by the transfer process, from any, even the earliest printed works and engravings, provided any portion of the oil still remains in the ink.

Note BR, page 841, to follow the paragraph ending "are not at present used." (Inventors of various cutting machines.)

Since the article on File Cutting Machines was written, the author finds that Thiout was not, as he had supposed, the inventor of the first machine for cutting files; as in the Memoir on the subject by M. de Montigny, read before the Committee of Commerce in 1778, the following were noticed as the more important of the machines invented for cutting files - namely, that constructed by Duverger in 1699 - by Fardonet 1726 - by Thiout 1740 - by Brachat et Gamain 1756 - and by Vaucher 1778.

To these machines are to be added those subsequently made by Raoul in 1800 - and by Ericson in 1836. See Article Limes, (Vol 12, p. 289, of the) Dictionnaire Technologiquedes Arts et Metiers, Paris, 22 vols. 8vo. and 2 vols. Atlas, 1822 - 1885.

Note BS. - Referring to page 299 of the First Volume.

During the period in which the last sheet of this appendix was being printed, Mr. T. Taylor kindly pointed out to the author that in the table for converting decimal proportions into divisions of the pound avoirdupois, inserted on page 299 of the first volume, a clerical error had been committed from the subdivisions of the avoirdupois ounce having been considered to consist of 8 drams, as in apothecaries' weight, instead of 16 as in avoirdupois weight

The author much regrets this oversight, which arose from the circumstance of the avoirdupois ounce being rarely subdivided in common use more minutely than into halves or quarters, and he inserts overleaf the corrected table, which Mr. Taylor has been kind enough to calculate for this work.

Table #2 For Converting Decimal Proportions Into Divisions Of The Pound Avoirdupois

Decimal.

oz.

dr.

•39

1

•78

2

117

3

1.56

4

1.95

5

2.34

6

2.73

7

313

8

3.52

9

3.91

10

4.30

11

4.69

12

5 08

13

5.47

14

5.86

15

625

1

0

6.64

1

1

7.03

1

2

7.42

1

3

7.81

1

4

8. 20

1

5

8.59

1

6

8.98

1

7

9.38

1

8

9 77

1

9

10.16

1

10

10.55

1

11

10.94

1

12

11.33

1

13

11.72

1

14

12.10

1

15

12.50

2

0

Decimal.

oz

dr.

12.89

2

1

13.28

2

2

13.67

2

3

14.06

2

4

14.45

2

5

14.84

2

6

15.23

2

7

15.62

2

8

16.01

2

9

16.41

2

10

16.80

2

11

17.19

2

12

17.58

2

13

17.97

2

14

18.36

2

15

18.75

3

0

19.14

3

1

19.53

3

2

19.92

3

3

20.31

3

4

20.70

3

5

21.09

3

6

21.48

3

7

21.88

3

8

22.27

3

9

22.66

3

10

23.05

3

11

23.44

3

12

23.83

3

13

24 22

3

14

24.61

3

15

25.00

4

0

Decimal.

oz.

dr.

25.39

4

1

25 78

4

2

26.17

4

3

26.56

4

4

26 95

4

5

2734

4

6

2773

4

7

28.13

4

8

28.52

4

9

28.91

4

10

29.30

4

11

29.69

4

12

3008

4

13

3047

4

14

30.86

4

15

31.25

5

0

31.64

5

1

32.03

5

2

32.42

5

3

32.81

5

4

33.20

5

5

33.59

5

6

33.98

5

7

34.37

5

8

34.69

5

9

3516

5

10

35.55

5

11

35.94

5

12

36.33

5

13

36.71

5

14

37.11

5

15

37.50

6

0

Decimal.

oz.

dr.

37.85

6

1

38.28

6

2

38.67

6

3

39.06

6

4

39.45

6

5

39.84

6

6

40.23

6

7

40.62

6

8

41.02

6

9

41.41

6

10

41.79

6

11

42.19

6

12

42.54

6

13

42.97

6

14

43.36

6

15

43.75

7

0

44.14

7

1

44.53

7

2

44.92

7

3

45.31

7

4

45.70

7

5

46.09

7

6

46.48

7

7

46.87

7

8

47.27

7

9

47.66

7

10

48.05

7

11

48.44

7

12

48.83

7

13

49.22

7

14

4961

7

15

50.00

8

0

Application of the Table. The Chinese Packfong, similar to our German silver, according to Dr. Fyfe's analysis, p. 279, is said to consist of -

40.4

parts of Copper

equivalent to

6

oz

7

drams, full.

25.4

-

Zinc

4

-

1

-

full.

31.6

-

Nickel

5

-

1

-

nearly.

2.6

-

Iron

7

-

nearly.

1000

Parts.

16

oz

0

-

Avoirdupois.

Note BT. - To follow the notes J. K. L., on page 46 of Vol. I. (Mr. Joseph Gibbe Patent Carving Machine.)

Mr. Joseph Gibbs' patent for "improved machinery fur cutting marble, wood, and other substances," sealed 13 Nov. 1829, was inadvertently overlooked by the author, when he wrote the notes J. K. L of this appendix, on the carving machines subsequently patented by Irving, Jordan and Tomes, described on pages 954 - 7; he now proposes to supply the omission.

A general idea of Mr. Gibbs' carving machine will be conveyed by imagining the model and the copy, to be placed on two (operate horizontal platforms, situated one above the other; the drill and tracer are each exactly vertical, and in one and the same line; but of course in an interrupted line, as between them lies the platform with the model. The tracer is at the top of all, and rests on the model, the drill is below the model and rests upon the copy that it is in the act of producing.

It is next to be explained how the tracer and drill are simultaneously and equally moved in all directions, over the model and copy which lie at rest; and this is accomplished by building them in one vertical lino at the outer edge of a double swing frame, consisting of two frames or panels which move on joints, somewhat as a folding door that consists of two leaves jointed in the center; a construction which also resembles that of the double swing frame, used in Brunei's cross cutting saw machine, see fig. 789, page 796.

The two leaves of the swing-frame - to borrow the words of the former description, - give respectively the powers of moving the tracer and drill simultaneously from North to South, and from East to West. In addition to these two motions is a third; for the entire mass of the swing frame is moveable vertically, as it slides through fixed circular bearings, and is supported on a treadle which allows the drill gradually to penetrate the work, until the further descent of the machinery is arrested, from the tracer coming into contact with the model to be copied. As in Brunei's saw machine and some others, the motion of the prime mover, is communicated by belts or straps, reeved on pulleys situated at the two axes of motion, so that the rambling of the tool does not affect the tension of the bands.

One great application of this machine was to the cutting of the wooden letters used for shop fronts, several in one pile, and in which case a metal templet was used. The machine presented all the elements required for the purposes of carving, and was used for that purpose; but the duplication of the swing frame enfeebled the construction, and gave rise to more vibration than exists in the subsequent machines of Irving, Jordan, and Tomes, which all more or leas resemble Gibbs' original machine in principle, although severally different in construction, and more efficient in use.