apparatus (1) Reaction chamber (2) receiving chamber (3) No 100-150 stainless steel screen.Add openings,teflon stopcocks,and hooks as shown.Use teflon ring to seal joint at screen.opening in 1 lets atm. pressure be exerted on liq.surface when app.is inverted to filter sample. flared opening in 2 is used to remove filtrate and to add solvent for second extn. Side outlet in 2 is used to apply rapid short gusts of vac. to remove max. amt solvent from samples or to aid in filtration.