118 WEATHERBY, BORN, AND HARDING 
angles to each other so that one set of data was taken along the bed- 
ding plane and the other across the bedding plart. 
The time-distance graphs (Fig. 5) of these two profiles were drawn 
as straight lines since the accuracy of the data was not great enough 
to determine penetration. 





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ee eA AA ae eer ee | 
oe a a 7 a PP 
Vena i 




TIME DISTANCE GRAPH 
ARBUCKLE LIMESTONE 
a 
Ss a exec 
Cee a ee acini 
HC Wa vie 
ASAE 
ae ae ee, 

DISTANCE — FEET 
Fic. 5.—Time-distance graph, Arbuckle limestone. 
The average velocity across the bedding planes of the limestone 
was found to be 13,430 feet per second and the velocity along the 
bedding plane was found to be 17,430 feet per second. 
These results are in agreement with the data presented by Mc- 
Collum and Snell.® 
In conclusion, the writers wish to express their thanks to E. E. 
Blondeau and L. Y. Faust for their assistance in calculating and 
checking the data. 
8 Burton McCollum and F. A. Snell, “Asymmetry of Sound Velocity in Stratified 
Formations,” Physics (March, 1932), p. 174. 
640 
