On 23 December 2014 at 10:49, James Cameron wrote: > .... I've not heard of any tests with ultrasonic baths. Inserting fingers in water near the transducer of even a small ultrasonic "fogger" produces a very unpleasant "bite". Ask me how I know. Russell --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .