claims.

26--The drawings to be in duplicate, one copy on heavy parchment, the
other copy on tracing cloth, the drawings to be made with india ink of
best quality and with pen only, every line and letter must be black. The
size of a sheet on which a drawing is made should be exactly 10x15
inches, one inch from its edges a single marginal line to be drawn,
leaving the "sight" 8x13 inches. Within this margin all work and
signatures must be included, one of the smaller sides of the sheet is
regarded as its top, and measuring downward from the marginal line a
space of not less than 1-1/4 inches is to be left blank for the
insertion of Title, Name, Number and Date.

27--The scale to which a drawing is made should be large enough to show
the mechanism without crowding, and more than one sheet may be used, if
necessary, to accomplish this end. Letters and figures of reference
should be carefully formed, and large enough to be plainly
distinguished. If the same part of the invention appears in more than
one view of the drawing, it must always be represented by the same
character; and the same character must never be used to designate
different parts.

28--No agent's or attorney's stamp, or advertisement, or written
address, will be permitted upon a drawing.

Should the application be found incomplete under the above rules and be
returned from the Minister of the Interior for amendment, the same must
be again filed within thirty days, if the applicant is a resident of
the Hawaiian Islands, or within four months if residing in a foreign
country; otherwise it will be barred, if interfering with another
application filed during the interval and covering the same invention or
improvement.

THE MODEL.

29--A model will not be required as part of the application unless on
examination of the case it shall be found to be necessary or useful;
when, if so found, the Commissioner of Patents shall, in writing, notify
the applicant, and action in the case shall be suspended until a model
is furnished.

30--The model must clearly exhibit every feature of the machine which
forms the subject of a claim of invention, but should not include other
matter than that covered by the actual invention or improvement, unless
it shall be necessary to the exhibition of the invention in a working
model.

31--The model must be neatly and substantially made of durable material,
metal being deemed preferable; but when a material forms an essential