In general, these signs are used as part-word contractions whenever the letters they represent occur within a word, even if they overlap a minor syllable division (see Lesson 4, 4.5c). Thus, the sign for ch is used in Chicago and scratch; the sign for sh in shoe and hush; the sign for th in thorn and filth; the sign for wh in what and whale; the sign for ou in proud, four, and coupon; the sign for st in state, past, and pistol; the signs for th and st in thistle; the signs for ou and ch in touch; and the signs for wh and st in whitest.
Whenever these contractions are joined to other letters they take on their part-word meaning and lose their whole-word status. This rule applies even if a word is divided between lines and the letters of a contraction stand on a line alone. Examples: