DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.62828#0160
( i°4 )
Proceed to io on the femicircle io, and take half of its whole
fpace, and place it each way from the perpendicular on the
arch io at No. i, as was done on the arch n before; and in
this manner go through the whole, and a fufficient number of
points will be found in order to draw an irregular curve an-
fwerable to a perpendicular fedtion of the propofed folid, and
which will alfo anfwer for its covering or veneering.
But here I muB obferve to the workman, that in cafe it
fhould be propofed to him to veneer any thing of the like
forms of Fig. 32 and 33, it would not do to cut out the veneers
fo broad that fourteen pieces would be equal to the circum-
ference. It would require twenty-eight pieces at lead:, before
they could be laid down with fafety and eafe, efpecially if it
were required that the joints of the veneers fhould be fo clofe
as to preclude the neceffity of putting in Bringing to hide
them. I fpeak this not merely from theory, but practice, hav-
ing myfelf veneered knife-cafes of the fame ihape with the
figures in the Plate, and where no Bringing wras admiflible to
hide the joints. But every thinking workman will eahly per-
ceive that it makes no difference in the methods of finding the
curve lines for the covering, whether the number of pieces be
fourteen or twenty-eight.
By thefe methods a fphere or globe may be covered, and a
curve,
Proceed to io on the femicircle io, and take half of its whole
fpace, and place it each way from the perpendicular on the
arch io at No. i, as was done on the arch n before; and in
this manner go through the whole, and a fufficient number of
points will be found in order to draw an irregular curve an-
fwerable to a perpendicular fedtion of the propofed folid, and
which will alfo anfwer for its covering or veneering.
But here I muB obferve to the workman, that in cafe it
fhould be propofed to him to veneer any thing of the like
forms of Fig. 32 and 33, it would not do to cut out the veneers
fo broad that fourteen pieces would be equal to the circum-
ference. It would require twenty-eight pieces at lead:, before
they could be laid down with fafety and eafe, efpecially if it
were required that the joints of the veneers fhould be fo clofe
as to preclude the neceffity of putting in Bringing to hide
them. I fpeak this not merely from theory, but practice, hav-
ing myfelf veneered knife-cafes of the fame ihape with the
figures in the Plate, and where no Bringing wras admiflible to
hide the joints. But every thinking workman will eahly per-
ceive that it makes no difference in the methods of finding the
curve lines for the covering, whether the number of pieces be
fourteen or twenty-eight.
By thefe methods a fphere or globe may be covered, and a
curve,