rite an approximate or tentative definition of the matter thus
assembled in each bundle and attach it to its appropriate bundle.

(4) Where it appears that the subject matter of any bundle formed from
the patents of any subclass is analogous to matter in other subclasses
of the same class or in other classes, a note should be added to that
effect so that this matter may be given special consideration.

(5) When the same examiner or different examiners are working on
different subclasses containing analogous matter, parallel lines of
subdivision should be followed wherever possible, in order to effect an
arrangement that will facilitate comparisons.

(6) When subdividing a group of more or less complex organized structures
or mechanisms, note should be taken of subcombinations that form or it
is thought should form the basis of other subclasses, either in the same
or different classes, into which those details may be collected, either
classified therein originally or by cross-reference.

Example: Assuming that the combination of press, folder,
and wrapping mechanism, referred to in a preceding
paragraph is to be classified in a class of Printing, on
the entirety as a combination having the function of
printing, plus other functions, and that folding and also
wrapping are separately classified, then the particular
type of press should be selected to be cross-referenced
into a press-type subclass of the class of Printing, such
as "Presses, rotary," while the folding mechanism and the
wrapping mechanism would be noted for cross-reference to
other appropriate classes. Also, any part of the printing
press, such as the inking mechanism, specifically
described, should be noted for cross-reference into a
subclass of Printing designed to receive the inking
mechanism as a part of the printing press.

(7) After a knowledge of the material of the class has been obtained by
estimating the resemblances between the individual patents that have
been assembled in the several groups, comparison of these groups,
represented by the bundles of photolithographs, by the aid of the
approximate definitions and notes attached can be made. It can then be
decided whether all of these groups are to be retained in the proposed
class, and the retained groups can be organized into a class with the
subclasses arranged so as to bring those subclasses having the strongest
resemblances in closest relation,