Sect. XVIII. r, OF SLEEP. 153 



SECT. XVIIL 



OF SLEEP. 



I. Volition is fufpe tided in Jleep. 2. fknfation continues. Dreams 

 prevent delirium and inflammation* 3. Nightmare. 4. Ceafe^ 

 lefs flow of ideas in dreams. 5. We feem to receive them by the 

 fenfes. Optic nerve perfectly fenfible in fleep. Eyes lefs dazzled 

 after dreaming of vifibk objecls. 6. Reverie, belief. 7, Hou) 

 we di/linguiflj ideas from perceptions. 8. Variety of fcenery in. 

 dreams y excellence of the fenfe of vi/ion. 9. Novelty of combina- 

 tion in dreams. 1 o. Diftinclnsfs of imagery in dreams. 1 1 . Ra- 

 pidity of tranfaclion in dreams. 12. Of meafuring time. Of 

 dramatic time and place. Why a dull play induces fieepy and an 

 inter efing one reverie. 13. Conjcioufnefs of our exifilence and 

 identity in dreams. 14. How we awake fometimes fuddenly % 

 fometimes frequently. I^. Irritative motions continue in fieepy 

 internal irritations are fucceeded byfenfation. Senfibility increafes 

 during jleepy and irritability. Morning dreams. Why epilepftes 

 occur in Jeep. Mcflafy of children. Cafe of convulfions in Jleep*. 

 Cramp, why painful. Ajlhma* Morning fweats* Increafe of 

 heat. Increafe of urine in Jeep. Why more liable to take cold in. 

 Jleep. Catarrh from thin night-caps. Why we feel chilly at the 

 approach of Jeep, and at waking in the open air. 16. W^hy the 

 gout commetices in Jeep. Secretions are more copious in Jleep, young 

 animals and plants grow more in Jeep. 17. Inconfjlency of 

 dreams. Ab fence of furprife in dreams, 18. Why we forget 

 fine dreams and not others. 19. Sleep talkers awake with fur- 

 prife. 20. Remote caufes of fleep. Atmofphere with lefs oxygens 

 Compreffion of the brain in the Jpina bifida. By whirling on a 

 horizontal wheel. By cold. 2 1 . Definition of Jleep. 



1. There are four fituations of our fyflern, which in their 

 moderate degrees are not ufually termed difeafes, and yet 

 abound with many very curious and inftruclive phenomena ; 

 thefe are fleep, reverie, vertigo, drunkennefs. Thefe we fhall 

 previoufly confider, before we fi:ep forwards to develop the caufes 

 and cUres of difeafes with the modes of the operation of medi- 

 cines. 



As all thofe trains and tribes of animal motion, whieh are 

 fubjected to volition, were the lalt that were caufed, their con- 

 nexion is weaker than that of the other claiTes j arTd there is 

 a peculiar circumftance attending this caufation, which is, tha<: 

 it is entirely fufpended during fleep : whilfl tire other clafTes of 



Vol. I. W potion, 



