123 



values of the gas energy G(a); however, his meapurements of 

 velocity are not very accurate, and the assumptions from which 

 he obtained the equation of state of the gas may be consider- 

 ably in error. Plotting the left side of (5) as a function 

 of a he drew the conclusion that about four-fifths of the 

 quantity { Q-W) represented acoustical energy radiated in the 

 stages a^ an^a Y. while one-fifth represented dissipation due 

 to viscosity and thermal conduction in the later stages of 

 the expansion. Very little weight can be ^iven to this, 

 however, because of the uncertainty in both the Icinetlc and 



potential energies. Ramsauer also concluded that the tempera- 



^ 

 ture of the gas at the end of the expansion was 160 C. , so 



that none of the water formed by the explosion could condense. 

 This conclusion of course rests on the validity of Ramsauer' a 

 assumptions regarding the equation of state of the explosion 

 products. 



Ramsauer noticed that at maximum size the bubble ex- 

 tended about 10^ farther, measured from the initial center of 

 the explosive, in the horizontal direction than in the down- 

 ward direction. This rising of the gas bubble is to be 

 expected, of course, and is In approximate quantitative 

 agreement with the theory of Section 5 and Appendix A. Another 

 incidental effect was observed which- if real is a little puzzling: 

 ^ax seemed to be slightly decreased by placing an equal volume 

 of air in the tube which contained the guncotton. 



