D X, Nerves, changes in them not. ©wing to the conftriclion of the arteries, 51.7 liable to various difeafes, 525 our ignorance of the caufes of their difeafes, 526 the effects of their difeafes owing to changes in their fenfibility, 526 their effets when too acute, 526~ =—— - when too blunt, 526, 527“ — -—— when unnatural or depraved, 527 ---—— when deprived of feeling altogether, 527 -----when too ftrong, 527, 528 when their moving power is totally wanting, 52 8 — ...... difficulty of diftinguifiiing their difeafes from others, 528. 529 — ----— have different fenfations in different organs, 537 ■--------- their feeling varies.in different people, and even in the fame perfon at different times*. 538 ——• — of children, very fenfible, $38 ——.....— varieties of the pulfe in healthy people, owing to their different fenfibility, 549 «- their fenfibility greatly.changed by difeafes, 548. 549. Nervous Disorders* of them in general, 525. 549 -— --- difficulty of diftinguifiiing them from others, 528 *-- defined, 528. ùc... ■----- their moft common fymptoms, 5301—532? ——- diftinguifbed into claffes, 532, 333 -—■■ hyfteric and hypochondriac generally confidered as the fame difeafes, 533 opinions of different authors concerning the caufe of the hyfteric difeafe in men and women, 535. 536 Predisposing Causes of them, 537—350' — ift, too great fenfibility of the nervous fyftem, 537—5431 — 2d, uncommon weaknefs in various parts of the body, 543—554 General Occasional Causes of them, 551—570 — ift, fome morbid matter in the blood, 55,j—564 — 2d, the retention of accuftomed evacuations, 564—567 — 3d, want of a fufficient quantity of blood, 567—569 — Particular Occasional Causes of them, 570—585. — ift, wind in the ftomach and inteftines, 570—572 --2d, a tough phlegm in the. ftomach and inteftines, 57,2. 57.3, —— 3d, worms in the prima via, 573, 5.74. --4th, improper aliments, 574. 575, - 5th, fchirrous obftruftions in the inteftines, liver, fpleen, <àc. 575—380 — ôth, violent affeßions of the mind, 580-—585 — Observations on fome of their mol remarkable Symptoms, 586_630* - ift, an uncommon heat or cold in different parts of the body, 586—588; --2d, pains fuddenly ftiifting from one place to another, 588. 589 “— 3^» hyfteric faintings and convulfions, 589. 590 - 4th, a catalepßs and tetanus, 590. 591 5 ° 2. —