Experimental apparatus for reacting hot water and rhyolite

Experimental apparatus for reacting hot water and rhyolite. The photo on the left shows the inert gold bags into which the rhyolite fragments and water were inserted. After being sealed, the gold bag is then placed into a steel pressure vessel, which itself is loaded into a furnace (photo on the right). The furnace is connected through several wires to a controller that regulates the temperature, and the pressure vessel is connected through a small tube to a gauge that regulates the pressure. During the experiment, the furnace is continuously rotating to maintain a suspension of the rhyolite fragments in the water. Each experiment lasted for about 90 days, after which the vessel was removed from the furnace and quickly cooled (quenched) to room temperature.