262 DR. LOUIS VESSOT KING ON THE PROPAGATION OF SOUND IN THE FREE 
temperature inequalities, the eddy-motion character of wind blowing over land is probably accentuated 
with a marked effect on the attenuation of sound. 
No. 8. September 9, 1913. Table 8 and Chart 8. 
The transmission of sound is seen to be extremely bad. This is probably due to the fact that the wind 
was blowing along the direction of the shore and thus contained marked temperature irregularities as well as 
Chart 8. Acoustic survey, September 9, 1913. 
more irregular eddy characteristics. On certain occasions with the wind in this quarter the alternations 
of warm and cool air may be distinctly felt. 
No. 9. September 10, 1913. Table 9 and Chart 9. 
A comparison with Chart 6 shows the unfavourable conditions for transmission of the signals set up by 
a wind blowing along the shore or from over the land, confirming conclusions already made. 
Chart 9. Acoustic survey, September 10, 1913. 
