Instrumentation for measuring and recording mass and energy transfer from volcanoes to atmosphere

A new approach to the understanding of volcanic activity is attempted. It consists in establishing tentative correlations between all measurable physical, chemical and geophysical eruptive parameters. The first stage of this program is to devise and design gauges and recorders of different types to be used on different types of existing eruptive vents, whatever their shape, size, violence and accessibility. The methods adopted and the first results obtained on the physical parameters of eruptive gases are described here.