The New International Encyclopædia/Key to pronunciation

An apostrophe, or superior comma, [’] is sometimes used to denote a glide or neutral connecting vowel, as in tā′b’l (table), kăz′’m (chasm).

Otherwise than as noted above, the letters used in the respellings for pronunciation are to receive their ordinary English sounds.

When the pronunciation is sufficiently shown by indicating the accented syllables, this is done without respelling; as in the case of very common English words, and words which are so spelled as to insure their correct pronunciation if they are correctly accented. See the article on.