WIND. 



11 



This hurricane was preceded by, and accompanied with an excessive 

 rainfall and high thermometer, which is invariably the case with 

 well-marked cyclonic depressions. The rainfall for the 24 hours 

 from 9 a.m., 17th, to 9 a.m., 18th, was 1*55 inch, the highest for 



Beaufort's Pressure of wind in pounds per square foot. 



Scale. 5 10 



FIG. 5. Diagram of relative wind velocities and pressures. 



several years. If we include the 12 hours previous to this, we have 

 36 hours with the heavy rainfall of 2*13 inches. The maximum reading 

 of the thermometer on the forenoon of the 17th was 48'8 this high 

 Ggure being caused by reduced pressure and atmospheric saturation. 



