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\subsection{Second Sound}  For second sound, the process of increasing temperature by increasing pressure was used as in first sound. All the pressures were then converted to temperatures as in first sound using a Maynard Table and temperatures were measured from 1.3 K to 2.12 K. TThe equation used to find the sound speed is  \[c_2=\frac{f2L}{n}\]  where n is an integer. In the For each  data recorded file taken  for the frequencies, frequencies of second sound,  four resonances that were moreclearly  defined were used for each data file  up until 2.12 K where after this temperature the frequencies werent clearly defined. These frequencies correspond to mode number n, and n was found to go from n=3,4,5,6. The second sound was then computed for each mode number and then averaged. the average of these were used for analysis.