Cavitation, Tensile Strength, and the Surface Films of Gas Nuclei 



e -^ 



BUBBLE DOES NOT 

 ADHERE TO SURFACE 



Fit 



Bubble adherence to a surface 



7—p — ^-7 — 7 — 7 — 7^ — 7 — 7 



e = 45 



BUBBLE FAIRLY EASY 

 TO DISLODGE 



OS. 



^ — 7 — 7 — 7 — 7 — 7- 



7—7 — r"-? — 7 — 7 — 7- 



^ 



e -- 90 



BUBBLE ADHERES 

 TENACIOUSLY TO 

 SURFACE 



Table 1 

 Rating of Materials for Noncavitating Duty 



*Excellent - 3; good - Z; fair - 1; bad - 0. 



^pc rubber is a general designation for rubber like materials possessing the same 

 acoustic properties as water. 



83 



