Gassy Rocks – Coals and Shales Gas Content Measurement Core Desorption Gas Content Without Coring Gas Content From Cuttings Gas Capture Core Barrel Gas Sorption Isotherms – Gas Storage Isotherms by Regassing Native Sorption Isotherms Diffusional Behaviour Diffusion from Cuttings Apparent Diffusion Coefficient from Core Stress & Permeability Changes – Stress Path