IN RAIN AND SNOW IN THE UNITED STATES. 



159 



approximations, considering the irregularity in the phenomenon itself, and the com- 

 parative scantiness and frequent discontinuity of our records. While these deduc- 

 tions follow from the present collection and combination of available material, they 

 may stimulate to more extended observations and serve as a basis of more detailed 

 investigations hereafter. 



