#    Date    T [K]  p_tot[torr]   p_ch4[torr]  l_cell [m]
----------------------------------------------------------
 1   790709   299.1    19.50        19.5000       20.0 
 2   790709   298.4    9.890        9.89000       20.0 
 3   790709   298.4    4.000        4.00000       20.0 
 4   820914   295.7    9.303        9.30300       92.0 
 5   850523   297.4    199.6        4.99000        1.5 
 6   850523   297.4    275.6        6.89000        1.5 
 7   850523   297.5    350.6        8.76500        1.5 
 8   850523   297.7    425.0        10.6250        1.5 
 9   850523   297.7    550.5        13.7625        1.5