File:Treatise on marine and naval architecture, or, Theory and practice blended in ship building. Illustrated with more than 50 engravings (1852) (14583026888).jpg

Identifier: treatiseonmarine00grif (find matches)
Title: Treatise on marine and naval architecture, or, Theory and practice blended in ship building. Illustrated with more than 50 engravings
Year: 1852 (1850s)
Authors: Griffiths, John W. (John Willis), 1809-1882
Subjects: Naval architecture
Publisher: New York : D. Appleton
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
e square body, the originalline at which the floor was placed waspermitted to stand or remain unmoved,while the moulding-edge of the firstfuttock was removed its proper distancefrom the floor. The same or a similararrangement will apply to the cants ;the moulding-edge we have laid downmay remain, and the thickness of thechock may then be set off, inasmuch asit is the custom to reverse the order ofthe cants ; from which we shall discov-er that the line we already have in thecant body-plan is the first futtock. Thethickness of the chock may now beshown by another line being strickenin the half-breadth plan, aft (if inthe after-body) of the original line;they may be tapering or parallel, as weplease ; and the same operation mayagain be performed in transferring theform of this line also to the body-plan.These two lines are the moulding-edgesof the cants, and may be distinguishedby the color of the marks upon the floorand upon the moulds. We now wantto determine the bevel, inasmuch as (he
Text Appearing After Image:
MARINE AND NAVAL ARCHITECTURE, 253 bevelling edge of cants, or the amountof bevel they require, may and shouldbe determined at the same time ; or inother words, one follows the other. Inour delineations of the performance ofthis part of the work by water-lines,we squared a line across the joint ofthe frame at its connection with themiddle-line ; this line extended the sid-ing size of the timber, both above andbelow, or aft and forward. This wedescribed as the custom very generallyadopted. We shall in our expositionsof this part by diagonals pursue a some-what different course. At the conflu-ence of the joints with the middle-line,we may square up, but not down, aswe have no occasion for crossing themiddle-line. We may now apply a• straight ed»e across the timber, or itsspace on the floor ; square from thejoint of the same, or the straight lineshowing it—selecting the roundest partof any of the lines in the end of theship in which we are at work. Theobject of this operation is to

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