
742 THE AMERICAN NATURALIST. [Vor. XXXVI. 
Sept. 26. Fair; wind S.W., 10 miles. 2 fishhawks; 1 sparrow hawk. 
Sept. 27. Cloudy; variable light winds. No hawks seen. 
Sept. 28. Clear; variable light winds S.E. 1 fishhawk. 
Sept. 29. Stormy; wind E. 1 fishhawk. 
In the table given below are placed the days, thirteen in 
number, taken from the above list, when not more than one 
hawk was seen. The meteorological conditions at New Haven 
on these days is also recorded in the table. An inspection 
of the observations shows that no strong northwest winds 
occurred on any of these days. 



TABLE II. 
IT NuMBER | DIRECTION 
DATE, 1895. Was tik, |Winp Drrection,| VELOCITY, |. Hawks| or UPPER 
Lower STRATA.| MILES PER : 
dion: OBSERVED. | STRATA. 
Sept. 7 Fair NE. 15 I — 
Mo Cloudy S.W. 18 I 
ieee Fair Variable si o Mu 
y I2 Fair y Oo SN 
€. 3B Cloudy S.W. 7 o uv 
Soar 89 Rain N.E. 6 I N.E. 
"c 30 Cloudy S.W. 5 o W. 
I SE Clear W. 2 o nem 
M AS W. 1 o w. 
* o 6 Cloudy E. Light o N. 
x RT Cloudy N. 4 o eS 
To Clear N. 9 I Ti 
= 8g Cloudy N.E. 7 I S. by W. 






It has been observed that the direction of the movement of 
the upper strata does not influence the migratory movement, 
and that the surface currents are those in which the hawks 
usually migrate. In the last column of Table II the direc- 
tion in which the upper strata were moving is given in a few 
cases. The table, of course, is not meant to show the number 
of birds migrating, but it gives an idea of the number of hawks 
observed by one constantly watching for them. 
In the table given below, the U.S. Weather Bureau obser- 
vations are those for Boston on the days given in Table H. 
It is evident from a comparison of these two tables (II and 

