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Silicate-melt inclusions (MI) are small (-1 to 300 pum) blebs of silicate melt that are trapped within igneous phenocrysts (Fig. 1). They are glassy or crystalline, and are found within both extrusive and intrusive rocks. Because they can form at high pressures and are contained within relatively incompressible phenocryst hosts, they may retain high concentrations of volatile elements that normally escape from magmas during degassing. As such, analysis of these inclusions provides direct information on the volatile contents of magmatic systems. A number of recent papers have used silicate MI to understand magma degassing, to characterize the compositions of immiscible fluids separating from magmas, and to study petrogenetic processes such as magma mixing and crystal fractionation. The use of MI has allowed greater understanding of igneous geochemistry and magmatic processes (Table 1). This paper reviews …