The Ohio Naturalist , 
PUBLISHED BY 
The Biological Club of the Ohio Stale University. 
Volume III. APRIL. 1903. No. 6. 
TABLE OF CONTENTS 
Jennings— Further Notes on some Climatic Conditions of Ohio 403 
Smith— T he Song of the Fox Sparrow 4 1 1 
Sanders— Chionaspis. (New Species.) 413 
Selby— An American Memoir on Etiolation Studies 415 
Hine — The Genus Peditia With One New Species 417 
Claassen— Interesting Specimens of Specularia Perfoliata 418 
FURTHER NOTES ON SOME CLIMATIC 
CONDITIONS OF OHIO. 
Otto E. Jennings. 
An attempt was made in a former article* to present in brief 
form some of the conclusions reached in a study of the climatic 
conditions of Ohio from an ecological point of view. Further 
work along this line has shown that a more extended compilation 
of data is very desirable, if not actually necessary, in anything 
approaching a comprehensive study of Ohio climate as an eco- 
logical factor. 
So, in order to get a better basis for study, data were compiled 
relative to («) wind velocity and direction, ( b ) relative humidity, 
and ( c ) average date of first and last killing frost of the season. 
WIND, — DIRECTION AND VELOCITY. 
Plate 12 - Map IX. 
In attempting to derive as accurate general averages as possible, 
use was made of records as taken by self-registering instruments 
of the U. S. Weather Bureau stations at Cincinnati, Columbus, 
Cleveland, Toledo, Sandusky and Pittsburg. These records extend 
back to 1892, thus giving readings of ten consecutive years. 
As generally supposed the prevailing direction of the wind in 
Ohio is south-west. The direction in the region of Cincinnati 
seems to be very uncertain ; it is given on our map as south-west 
based on averages reported by the U. S. Weather Bureau in 1896 
for a period previous to that date, but for the period 1892 to 1902 
Ohio Naturalist, 3 : 339-345. Jan., 1903. 
