按键盘上方向键 ← 或 → 可快速上下翻页,按键盘上的 Enter 键可回到本书目录页,按键盘上方向键 ↑ 可回到本页顶部!
————未阅读完?加入书签已便下次继续阅读!
uccess of the victorious paper shells of the Cornell College navy; which were enlisted in the struggles of two seasons at Saratoga; against no mean antagonists; the college crews of the United States; surely proves that in strength; stiffness; speed; and fineness of model; the paper boat is without a rival。
When used in its own peculiar sphere; the improved paper boat will be found to possess the following merits: less weight; greater strength; stiffness; durability; and speed than a wooden boat of the same size and model; and the moulded paper shell will retain the delicate lines so essential to speed; while the brittle wooden shell yields more or less to the warping influences of sun and moisture。 A comparison of the strength of wood and paper for boats has been made by a writer in the Cornell Times; a journal published by the students of that celebrated New York college:
〃Let us take a piece of wood and a piece of paper of the same thickness; and experiment with; use; and abuse them both to the same extent。 Let the wood be of one…eighth of an inch in thickness the usual thickness of shell…boats; and the paper heavy pasteboard; both one foot square。 Holding them up by one side; strike them with a hammer; and observe the result。 The wood will be cracked; to say the least; the pasteboard; whirled out of your hand; will only be dented; at most。 Take hold and bend them: the wood bends to a certain degree; and then splits; the pasteboard; bent to the same degree; is not affected in the least。 Take a knife and strike them: the wood is again split; the pasteboard only pierced。 Place them on the water: the wood floats for an indefinite time; the pasteboard; after a time; soaks; and finally sinks; as was to be expected。 But suppose we soak the pasteboard in marine glue before the experiment; then we find the pasteboard equally as impervious to the water as wood; and as buoyant; if of the same weight; but; to be of the same weight; it must be thinner than the wood; yet even then it stands the before…mentioned tests as well as when thicker; and it will be found to stand all tests much better than wood; even when it weighs considerably less。
〃Now; enlarging our pieces; and moulding them into boats of the same weight; we find the following differences: Wood; being stiff and liable to split; can only be moulded into comparative form。 Paper; since it can be rendered perfectly pliable; can be pressed into any shape desirable; hence; any wished…for fineness of lines can be given to the model; and the paper will assume the identical shape; after which it can be water…proofed; hardened; and polished。 Paper neither swells; nor shrinks; nor cracks; hence it does not leak; is always ready for use; always serviceable。 As to cost; there is very little difference between the two; the cost being within twenty…five dollars; more or less; the same for both。 Those who use paper boats think them very near perfection; and surely those who have the most to do with boats ought to know; prejudice aside; which is the best。〃
An injury to a paper boat is easily repaired by a patch of strong paper and a coating of shellac put on with a hot iron。 As the paper boat is a novelty with many people; a sketch of its early history may prove interesting to the reader。 Mr。 George A。 Waters; the son of the senior member of the firm of E。 Waters & Sons; of Troy; New York; was invited some years since to a masquerade party。 The boy repaired to a toy shop to purchase a counterfeit face; but; thinking the price (eight dollars) was more than he could afford for a single evening's sport; he borrowed the mask for a model; from which he produced a duplicate as perfect as was the original。 While engaged upon his novel work; an idea impressed itself upon his ingenious brain。 〃Cannot;〃 he queried; 〃a paper shell be made upon the wooden model of a boat? And will not a shell thus produced; after being treated to a coat of varnish; float as well; and be lighter than a wooden boat?〃
This was in March; 1867; while the youth was engaged in the manufacture of paper boxes。 Having repaired a wooden shell…boat by covering the cracks with sheets of stout paper cemented to the wood; the result satisfied him; and he immediately applied his attention to the further development of his bright idea。 Assisted by his father; Mr。 Elisha Waters; the enterprise was commenced 〃by taking a wooden shell; thirteen inches wide and thirty feet long; as a mould; and covering the entire surface of its bottom and sides with small sheets of strong Manila paper; glued together; and superposed on each other; so that the joints of one layer were covered by the middle of the sheet immediately above; until a sheet of paper had been formed one…sixteenth of an inch in thickness。 The fabric thus constructed; after being carefully dried; was removed from the mould and fitted up with a suitable frame; consisting of a lower keelson; two inwales; the bulkhead; in short; all the usual parts of the frame of a wooden shell; except the timbers; or ribs; of which none were used the extreme stiffness of the skin rendering them unnecessary。 Its surface was then carefully waterproofed with suitable varnishes; and the work was completed。 Trials proved that; rude as was this first attempt compared with the elegant craft now turned out from paper; it had marked merits; among which were; its remarkable stiffness; the symmetry of the hull with respect to its long axis; and the smoothness of the water…surface。〃
A gentleman; who possesses excellent judgment and long experience in all that relates to paper boats; furnishes me with the following valuable information; which I feel sure will interest the reader。
〃The process of building the paper shell…boat is as follows: The dimensions of the boat having been determined upon; the first step is to construct a wooden model; or form; an exact facsimile of the desired boat; on which to mould the paper skin。 For this purpose the lines of the boat are carefully drawn out of the full size; and from the drawings thus made the model is prepared。 It is built of layers of well…seasoned pine; securely fastened together to form one solid mass; which; after having been laid up of the general outline required; is carefully worked off; until its surface; which is made perfectly smooth; exactly conforms to the selected lines; and its beam; depth; and length are those of the given boat。 During the process of its construction; suitable rabbets are cut to receive the lower keelson; the two inwales; and the bow and stern deadwoods; which; being put in position; are worked off so that their surfaces are flush with that of the model; and forming; as it were; an integral part of it。 It being important that these parts should; in the completed boat; be firmly attached to the skin; their surface is; at this part of the process; covered with a suitable adhesive preparation。
〃The model is now ready to be covered with paper。 Two kinds are used: that made from the best Manila; and that prepared from pure unbleached linen stock; the sheets being the full length of the model; no matter what that may be。 If Manila paper is used; the first sheet is dampened; l