Then let them pronounce the diphthong ou, and write in one column the words out, our, thou, loud, proud, cloud, noun, bound, found, hound, mound, pound, round, sound, wound, bout, clout, flout, lout, gout, pout, rout, sprout, spout, shout, snout, stout, mouth, south, couch, crouch, slouch, pouch, vouch, roundabout, bounty, county, amount, abound, scoundrel, discount, expound, about, &c.; and in another, how, cow, bow, mow, now, vow, owl, scowl, brow, prow, howl, gown, brown, crown, drown, cowl, fowl, crowd, clown, frown, vowel, towel, trowel, prowess. Call attention to the proper diphthong, which we write with what we call i long, (but it is no sound of ĭh at all,) and which the Romans wrote as a diphthong with two letters, ae and ai, pronouncing it as we do the i in ire. Then let them write in columns bind, find, grind, hind, blind, kind, mind, rind, wind, violet, dialect, inquiry, horizon, &c.
This same diphthong is also written with the Greek y,—in my, thy, cry, try, fry, wry, fly, ply, asylum, dynasty, petrify, signify, vilify, vivify, simplify, rectify, edify, notify, &c.
Call attention lastly, to the diphthong yu, written first with the letter u simply, as in unit, humid, fuel, cubic, stupid, putrid, mutual, funeral, singular, bitumen, acumen, nutriment; and secondly with ew, as few, chew, pew, new, mew, mewl, eschew, sinew; thirdly with iew, as view; fourthly with eu, as in eulogy, European, &c.; sometimes with eau, as in beauty and its compounds.
There is no propriety in calling au a diphthong, as it is one sound, and not two sounds. It is one of the extra vowels of the English language, written when short with o (though it is no sound of o proper) a, aw, and oa.
And now we come to the consideration of the extra vowels, beginning with this sound heard short in not, and long in the name of a carpenter's tool, awl.
Explain that there is no character for this vowel in the Roman alphabet, because the sound was not in the Latin language, and then proceed to show how it is written in various ways: first with an o, as in bob, cob, fob, gob, job, mob, nob, rob, sob, cock, dock, hock, lock, clock, flock, mock, pock, frock, rock, crock, shock, sock, cod, hod, nod, pod, odd, shod, rod, sod, trod, doff, off, of, (pronounced ov,) cog, dog, fog, hog, jog, log, nog, doll, loll, poll, on, don, ton, pond, fond, blond, won, fop, drop, crop, lop, mop, pop, sop, top, chop, shop, stop, swop, prop, ox, box, fox, pox, moth, loth, froth, broth, lot, cot, dot, got, hot, jot, not, pot, rot, sot, tot, wot, grot, clot, shot, spot, boss, cross, dross, floss, loss, moss, toss, gloss, cost, frost, lost, tost, bond, fond, pond, pomp, romp. Then show that it is written sometimes with an a, as in all, fall, call, hall, gall, tall, wall, small, stall, ball, thrall, squall, squash, squad, squat, quart, war, dwarf, scald, bald, salt, halt, swab, ward, sward, warn, warp, warm, wand, want, was, wast, wash, swan, watch, swamp, waltz, wasp; sometimes with au, as in daub, fraud, gaudy, fault, vault, paunch, craunch, laurel, haul, caul, maul, augury, autumnal; and sometimes with aw, as in caw, daw, draw, haw, hawk, jaw, law, maw, paw, claw, straw, raw, thaw, squaw, saw, flaw, awl, shawl, bawl, brawn, drawn, awning, tawny, awkward, tawdry, sawyer, mawkish, lawful; also with oa in broad.
Another extra vowel, heard in the word man, is written, in default of a character for it, with a, as in cab, dab, gab, jab, nab, hack, back, jack, lack, pack, rack, crack, clack, black, bad, gad, glad, had, lad, mad, pad, sad, shad, bag, cag, fag, gag, hag, lag, nag, rag, crag, shag, sag, tag, wag, mall, shall, am, dam, flam, ham, sham, jam, an, ban, can, fan, clan, man, pan, ran, band, hand, land, stand, strand, grand, brand, cap, flap, gap, chap, lap, clap, map, nap, pap, sap, tap, at, bat, cat, fat, gat, hat, that, mat, pat, rat, brat, sat, spat, sprat, tat, vat. This same vowel is heard in the word plaid.
A third extra vowel is heard in pun, and written generally with an u; as cub, dub, hub, nub, rub, scrub, drub, tub, buck, duck, luck, cluck, muck, pluck, suck, stuck, truck, tuck, chuck, bud, cud, dud, mud, suds, stud, scud, buff, cuff, luff, bluff, muff, puff, stuff, ruff, scuff, bug, dug, drug, hug, jug, lug, slug, shrug, mug, snug, tug, cull, dull, gull, hull, mull, null, scull, gum, hum, drum, glum, plum, mum, rum, sum, bun, dun, gun, pun, run, sun, tun, stun, shun, up, cup, sup, bump, crump, dumps, gump, hump, jump, lump, mumps, pump, rump, us, buss, fuss, muss, rush, crush, gush, hush, mush, tush, bust, dust, gust, just, lust, must, rust, crust, but, cut, gut, hut, jut, nut, rut, tut, bunk, funk, sunk, drunk, trunk, hunt, punt, blunt, grunt, brunt, lunch, bunch, hunch, munch, punch, bulk, sulk, skulk, gulp, pulp, gulf, tuft, bung, hung, lung, clung, rung, stung, swung, strung, musk, rusk, dusk, tusk, busk, mulct, buskin, musket, runlet, bucket, public. This same sound is written with o in mother, brother, some, come, &c., and ou in touch, and in rough, tough, enough, in which gh sounds like ff.
The fourth extra vowel in English having no character for it is written, first, with i, as irk, shirk, dirk, kirk, mirk, quirk, bird, gird, whirl, quirl, girl, firm, first, chirp, shirt, sir, fir, stir, flirt, spirt, squirt, squirm, girdle, &c. Secondly, with e, as in err, her, herd, term, fern, pert, wert, overt, clerk, sperm, stern, insert, vermin, perhaps, perplex, persist, expert, divert, superb, sterling, verdict, pervert, ferment, fervent, servant, perfect, serpent, partner, sever, several, inter, internal, fraternal, paternal, maternal, external, infernal, interdict, intermix, infer; and generally the final er, as silver, toper, &c. Thirdly, this vowel is written with o, as in work, worm, word, worst, world, worth; and the final or, as in arbor, ardor, vigor, &c. Fourthly, with an u, as in urn, burn, turn, churn, spurn, cur, fur, blur, bur, purr, spur, curb, suburb, surd, curd, surf, scurf, turf, turk, lurk, curl, furl, hurl, hurdle; and the finals ur, or, and ture, as arbor, honor, perjure, injure, &c.
Another anomaly of English orthography is the silent e, at the end of so many words; as doe, foe, hoe, roe, toe, cue, clue, blue, glue, flue, give, live, lucre, axle, noble, ogle, reptile, fertile, sterile, sextile, flexible, futile, missile, famine, jasmine, destine, pristine, frigate, senate, reptile, legate, pensive, missive, active, captive, festive, motive, sportive, illusive, defective, objective, elective, invective, perspective, defensive, expensive, preventive, retentive, progressive, vindictive, restrictive, instinctive, descriptive, explosive, corrosive, delusive, exclusive, inclusive, preclusive, intensive, palliative, narrative, relative, privative, lucrative, intuitive, infinitive, explicative, figurative, imitative, indicative, superlative, diminutive, retrospective, barnacle, spectacle, miracle, pinnacle, article, particle, ventricle, edible, credible, flexible, audible, enoble, ignoble, sensible, senile, juvenile, feminine, eglantine, multiple, dissemble, assemble, quadrille, clandestine, intestine, determine, illumine, calibre, ferule, marble, pebble, treble, tremble, nibble, quibble, scribble, nimble, meddle, peddle, kindle, spindle, fiddle, riddle, griddle, quiddle, middle, twinkle, gargle, single, mingle, sparkle, speckle, sickle, tickle, trickle, dimple, simple, pimple, ripple, triple, pickle, grizzle, little, brittle, spittle, whittle, nettle, settle, kettle, startle, tinkle, sprinkle, valise, marine, ravine, machine, Alexandrine, creditable, and other words having the final syllable ble.