342 APPENDIX. 



tend. For by joining measures, which seem primarily to 

 ameliorate the condition of the nervous system, with those 

 which more directly regulate the chylopoietic organs, we 

 place the functions of the animal system in a state the most 

 favourable to health, which gives the greatest scope and 

 range to intellectual exertion, and which fortifies the body 

 best against the numberless diseases which the varieties of 

 climate, and of atmosphere, may have a tendency to produce 

 on the various degrees of strength and the peculiarities of 

 organization of different individuals. 



The reader who wishes to pursue further the effect of 

 atmosphere on health, may consult Cabanis Rapport du 

 Moral et du Physique de I'Homme. 2d vol. pp. 1. 161. 



C. 6. There are some circumstances about winds very 

 remarkable, and which seem inexplicable on any hitherto 

 invented hypothesis. The gusts of wind, in some high windy 

 weather, seem to fluctuate in a manner somewhat analogous 

 to the undulatory motion of waves. This fact may be easily 

 seen by a pendulous anemometer. When the wind is accom- 

 panied by the rain, the periods of the gusts may be counted 

 by the intervals of the more or less violent impulse of the 

 water on the windows opposed to the wind, or leaves of any 

 tree twined across them.* 



In the Phil. Trans, vol. xlviii. 1. is related a curious 

 instance of a violent gust of wind, which succeeded a flash of 

 silent lightning, and came from the same quarter. 



Winds Refer to D'Alembert's Reflections sur les Causes 

 Generates des Vents, and to several papers in Phil. Trans. 



* The philosopher watching this, as he lies in bed by night, must be 

 very careful to preserve his vigilance, as it is a most soporific sound. No 

 lute of Mercury, or Aeolian harp, is more lulling to the Argus eyes of the 

 ntudent. 



