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LOTS OF LAVA: Johan (Joop) Varekamp, the Harold T. Stearns Professor of Earth Sciences, chair of the Earth and Environmental Sciences Department, prepares to launch a homemade "volcano" for his class EES 154, "Volcanoes of the World" May 8 on Andrus Field. The volcano cell was built by the Wesleyan Machine Shop and upper-level students using many left over parts from an old telescope.

Classmates await the homemade volcano, which was launched by opening a valve from the distance. The cell was filled with plain water that has been charged it with CO2. The pressure drives the fluid out of the tank, propelling it up "like a mega champagne bottle opening event," Varekamp explained. 
Varekamp, pictured on far right, uses a rope to open a valve. The "volcano" erupted to more than 40 feet high for 11 seconds. The demonstration concluded the semester. (Photos by Olivia Bartlett)