!<>.} SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 51 



(4) From a comparison of the effects of different broad moun- 

 tain ranges of the same altitude, it results (see page 474 of my 

 article, or page 95 of this translation from the Monthly Weather Re- 

 view) that the smaller, and therefore steeper, mountains always 

 cause a smaller total condensation than the broader and narrower 

 mountain summits. Notwithstanding this, the density of precipi- 

 tation on the slope of the smaller is generally larger than on the 

 sl< >pe of the larger mountains because the smaller total precipitation 

 is distributed over a ground surface that is relatively much smaller 

 yet. In reality, however, this only obtains so long as the quantity 

 of water remaining suspended in the cloud is only a small fraction of 

 the total condensation; in the case of very narrow mountain ridges 

 it will be more apt to happen that a considerable fraction passes on 

 over and beyond the summit and is subsequently again evaporated 

 [and therefore does not appear as rainfall]. 



(5) I regret to notice that in the first two figures of my original 

 memoir, as also in the translation, the legend inscribed on the curves 

 representing the distribution of precipitation reads "precipitation 

 in millimeters per second," instead of "per hour," as is correctly 

 stated in the text; the necessary correction should be made. 

 [Corrections have been made in the present volume.] 



(6) A precise test of this theory cannot at present be carried out 

 because we have not sufficient observations of the condition of the 

 upper strata and of ground along the slope of a given mountain range. 



