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*** Source:  B. Stauffer, A. Neftel, G. Fischer, H. Oeschger  ***
***          University of Bern                               ***
***          Bern, Switzerland                                ***
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Dry extraction
 78.6   1955   1300 + 70
 82.6   1950   1180 + 70
 88.0   1940   1110 + 70
 96.4   1925   1020 + 60
100     1919   1000 + 70
113     1893    870 + 70
119     1882    900 + 80
130     1861    830 + 70
136     1849    890 + 80
144     1834    860 + 70
160     1804    730 + 80
177     1771    780 + 90

Vacuum melt extraction
 78.0   1956   1340 + 80
 80.0   1954   1260 + 80
 83.0   1949   1160 + 80
 96.0   1927   1100 + 70
101     1917    990 + 60
107     1907    990 + 60
120     1880    950 + 60
132     1857    900 + 60
147     1827    830 + 60
160     1804    840 + 60
177     1771    800 + 60