| Lines 42-43 were replaced by lines 42-46 |
| - minimal sample temperature is only about 2.5 K. It seems that putting more |
| - exchange gas does not eliminate this problem. |
| + minimal sample temperature is only about 2.5 K. It seems that increasing the |
| + amount of exchange gas does not help until it begins to condensate at |
| + the heat exchanger. If the scattering from the exchange gas does not |
| + disturb the measurement, achieving something around 1.8 K should be |
| + feasible. |