Dear TEd: I had physics so long ago I am not equipped to debate the matter. But if
you just turned the nozzle, you would get only a few bits of solid. The chamois does
promote the production of the dry ice. Speaking of CO2 fire extinguishers, when I
was asst. director at Biological Lab, a safety inspector found all our CO2 extinguishers
empty. It took a bit of detective work to discover that a night watchman who had been
told to kill any mice that had escaped from cages had done so by turning CO2
fire extinguishers on them.