From C. P. HAYES
May I draw your attention to an error in This Week, 5 September? The
caption to the colour photograph of Mount St Helens should read: ‘Molten
lava has a temperature of about 1000 °C,’ (not 10 000 °C) ‘ . .
. but this falls to around 50 °C at the solid surface’.
C. P. Hayes Dartford, Kent
