Remarks on the Quantity of Rain at Different Heights. 161 



In its manners, as much as I was able to observe, it resembles 

 those of the other Wood Warblers, though I never saw it hang 

 to the branches like S. pensilis, to which it has some resemblance 

 in color. 



Its notes are similar to those of S. discolor and S. astiva. 



XXVI. — Remarks on the Quantity of Rain at Different Heights. 



By Professor 0. W. Morris, New York. 



\ Read September 17, 1855. 



At a meeting of the Lyceum of Natural History of New 

 York in 18-16, and at the meeting of the American Association 

 for the Advancement of Science, at Albany, in 1851, some 

 account was given of the quantity of rain at different heights, 

 with the hope that some other observers would, from the few 

 hints given, take up the subject, and furnish some more definite 

 information than was yet known, especially in this countrv ; 

 but nothing has yet fallen under my observation. Absence 

 from the state, and other causes, hindered me from prosecuting 

 the inquiry till 1854, when a gauge, such as used by the 

 observers of the Smithsonian Institution, was placed on the 

 observatory of the Institution for the Deaf and Dumb, in New 

 York city, and a similar one on the surface of the ground ; 

 the upper one eighty -five feet above the lower. 



From observations with these instruments, it has been 

 ascertained that the difference in quantity depends upon a 

 variety of circumstances ; for the quantity is generally increased 

 in a sudden thunder shower, or violent wind ; while with but 

 little wind, or a moist atmosphere preceding the rain, the 

 difference is slight. Thus in twelve thunder-storms which oc- 

 curred in twelve months, the lower gauge afforded 8.33 inches, 

 and the upper 5.35 inches, showing a difference of 1.98 inches ; 



