This section is from the book "The Manual of Phonography", by Benn Pitman And Jerome B. Howard. Also available from Amazon: The Manual of Phonography.
A small final hook may be attached to any stroke to represent n. When attached to straight strokes the n-hook is written in the evolute direction (see lines I to 3); when attached to curves it is written on the concave side of the curve (see lines 4 to 6).
a. When n is the last sound in a word use the hook as pen; except (b) when the n is preceded by two vowels, one of which is accented, in which case the stroke form should be used, as paan.When a word ends with a vowel preceded by n use the stroke, as penny
The n-hook is most frequently used at the end of words, but it is sometimes employed in the middle of an outline, in order to obtain a more convenient form. See line 7.
The circle s-z may be written within the n-hook and the combination thus obtained is read ns or nz. See line 8. This combination is chiefly useful in writing the plurals of nouns outlines of the singular of which end with an n-hook, but it is often used in other cases, and sometimes medially, as in line 9.
When s or z ends a word after an n-hook attached to a straight stroke, the combination may be contracted to a small circle written with evolute motion. See lines 10 to 12. This will not be mistaken for the circle s, which is always written after straight strokes with involute motion. See paragraph 79 a.
N-sez is written (a) after a straight stroke with a large evolute circle (see line 13). The large circle, however, cannot be written (b) within the n-hook after a curve, but must be written after the stroke-n, as shown in line 14.
In like manner the loops st and str are expressed as following the n-hook on straight strokes by writing them with evolute motion (see line 15), whereas the simple st and str following a straight stroke are written with involute motion (see paragraphs 92 and 97). Of course, neither loop can be written within an n-hook following a curve.
Exercise on the N-hook.

 
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