SPECIMEN VI.—Tools 28, 36; Click-plate, 288.
| Bed-plate. | Rest. | Number. | |
| 1¼ | 1 | 8 | done |
| B 12 | 12 | 127/48 | (to meet next circle) |
| 4⅜ | 17 | 24 | |
| 30 | ½ | 12 | |
| 29½ | 1 | 12 | |
| (On same radius as the last, and surrounding it.) | |||
| 29 | 1½ | 12 | |
| 28½ | 2 | 12 | |
| 28 | 2½ | 12 | |
| 27½ | 3 | 12 | |
| 27 | 3½ | 12 | |
| 26½ | 4 | 12 | |
| 23½ | 1 | 12 | |
| (3 done, 21 missed between last, or if click-plate 96.) | |||
| 25 | 1 | 12 | (between last) |
Although in the matter of beauty the patterns here given are by no means comparable to many others, especially to some lately published from blocks cut by Mr. George Plant, for the English Mechanic; they are, by their comparative simplicity, well selected to give the learner a good idea of designing and working with the eccentric chuck. It is not, indeed, proposed by the writer to multiply patterns, as mere copying of such is of small interest to those who are really endued with taste and skill; and the variations producible by combinations of different numbers of divisions of the click-plate and slide rest are of such infinite number, that printed designs of a score or two would not serve to teach the nature of this work better than the half dozen now before the reader. When a new chuck, indeed, is brought out, it is well to give a few specimens of its work, to show the possible purchaser its value as a means of ornamentation and the extent of its capabilities; but when these are understood, the purchaser had much better design for himself, instead of becoming a lazy imitator and copying patterns laid down by others. Details of designs that are presented in a tabular form remind us sadly (for we are married) of the old "knit one, drop two," "purl" or some such mysterious and, to us, detestable jargon wherewith ladies were, or are, wont to worry the ears of mankind.
The chuck of Professor Ibbetson, and the elliptic cutting frame of Captain Ash, are not introduced here, partly because this work has reached its intended limit, and partly because the inventors themselves have published separate works entirely devoted to a description of the arrangements and capabilities of their respective chucks. A brief notice is appended of Plant's geometric chuck, contributed by the inventor to the pages of the English Mechanic.[24]
[24] See Appendix.
The author now concludes his pleasant labours, the result of which is contained in the preceding pages. These labours have been lightened, and the work itself benefited, by several kindly-written remarks received from various readers of the English Mechanic, while the articles were in course of production in that paper. Criticisms and suggestions also came to hand in which no such kindly feelings appeared. These also have, nevertheless, had an equal share of attention, and where they appeared to be of value they have been turned to profit, and have resulted in various more or less important alterations and additions. "The Lathe and its Uses," thus re-arranged and modified, must now take its chance in the world with other productions of a similar character; and the writer hopes it may suffice to help those who need such assistance, and may be well received by others who though able to walk alone may yet cherish a kindly feeling for the friendly walking-stick.