Náttúrufræðingurinn - 1949, Blaðsíða 41

HITAMÆLINGAR í GEYSI
33
hvernig hitinn breytist, en ómögulegt er að teikna npp hitasveifl-
urnar án sjálfritandi tækis. Til þess eru þær of hraðar. Einnig mætti
mæla hraða „konveksjóns“-strauma í hvernum með því að liafa tvo
eða fleiri hitamæla með nokkurra metra millibili.
SUMMARY
Tlie present article deals rvith some measurements o£ the temperature in the Great
Geysir in Iceland. In these measuremcnts a thermistor made by the Bell Telephone
I.ahoratories. U. S. A. was used as a tiiermometer. Its time of reaction is much shorter
than for thc thermometers previously used for these measurements or about i/i sec.
Figure 2 shows how the temperature varies at different depths and fig. 3 shows how
tcmperature varies at 10 m. depth between two successive eruptions.
Superheated water was found wiih a temperature at least 6 centigrades ahove liie
boiling point.
3