Journal of Volcanology and Geothermal Research 74 (1996) 327 Contents Volume 74, 1996 Research Papers Origin of the Joya Honda maar, San Luis Potosi, México J.J. Aranda~-Gémez and J.F. Luhr Thermal effects of magma degassing D.L. Sahagian and A.A. Proussevitch A model for the opening of ephemeral vents in a stationary lava flow M. Dragoni and A. Tallarico Sulfur, chlorine and fluorine degassing and atmospheric loading by the Roza eruption, Columbia River Basalt Group, Washington, Pre-eruptive volatile content and degassing history of an evolving peralkaline volcano J. Barclay, M.R. Carroll, B.F. Houghton and C.J.N. Wilson In situ chemical fractionation in thin basaltic lava flows: examples from the Auckland volcanic field, New Zealand, and a general physical model W. Rogan, S. Blake and I. Smith Statistical analysis of New Zealand volcanic occurrence data M.S. Bebbington and C.D. Lai A Miocene basanite peperitic dyke at Stanley, northwestern Tasmania, Australia Y. Goto and J. McPhie Source strength assessment of volcanic trace elements emitted from the Indonesian arc E.-Y. Nho, M.-F. Le Cloarec, B. Ardouin and W.S. Tjetjep Scaling effects on vesicle shape, size and heterogeneity of lavas from Mount Etna H. Gaonac’h, J. Stix and S. Lovejoy Impure coolants and interaction dynamics of phreatomagmatic eruptions The restless, resurgent Campi Flegrei nested caldera (Italy): constraints on its evolution and configuration G. Orsi, S. De Vita and M. di Vito Hydrothermal alteration of a rhyolitic hyaloclastite from Ponza Island, Italy R.F. Ylagan, S.P. Altaner and A. Pozzuoli Chemical and isotopic investigations of fumarolic gases from Ischia island (southern Italy): Evidences of magmatic and crustal Magma mixing, fractional crystallization and volatile degassing during the 1883 eruption of Krakatau volcano, Indonesia C.W. Mandeville, S. Carey and H. Sigurdsson Evolution of high-K arc magma, Egmont volcano, Taranaki, New Zealand: evidence from mineral chemistry R.B. Stewart, R.C. Price and 1.E.M. Smith Helium isotope studies of geothermal fields in the Taupo Volcanic Zone, New Zealand J.R. Hulston and J.E. Lupton Book Reviews Contents Volume 74 (1996)