ON THE BAROMETER. 2,1$ 



sumed to represent or form a just estimate of the 

 whole twenty-four ; that calculations proceeding hi- 

 therto on such partial grounds, must neccssaiiiy in- 

 clude error and require adjustment, and that in fu- 

 ture, wherever this law extends, no correct philoso- 

 phical investigation connected with the nature of the 

 atmosphere, can be carried on without giving it a 

 place (c) ; and no just prognostic formed. of the weather 

 without distinguishing those regular and constant 

 changes from such as are only occasional and tempo- 

 rary. 



With respect to Medicine, this law is a principle 

 entirely new; and it has now become a matter of 

 real consequence, to ascertain in what respects it co- 

 operates with the power of the sun and moon in pro- 

 ducing and regulating the paroxysms of fevers. 

 From the striking coincidence of these tendencies with 

 the periods at which the paroxysms of fevers gene- 

 rally attack and remit, and from their superior preva- 

 lence in tropical climates where the paroxysms of 

 fever are also most prevalent, " it seem to he highly 

 Probable that they may have a considerable share in consti- 

 tuting that power which shews itself in so remarkable a 

 manner in this country, and which we have denominated 

 Sol- Lunar Influence," 



II. Of the Periodical Septenary Changes f the Barometer. 



XV. 



Res pec ting periodical septenary changes in the 

 state of the Barometer, the only information I have 



(c) A mean, extracted from means obtained from the extremes 

 of these different diurnal fluctuations, will give the meanweight or 

 ihe atmosphere much more correctly than the common process. 



P 3 been 



