Abstract: A method of determining an operating water temperature for a boiling water heater includes the following steps: (a) adding water to a tank to a predetermined level; (b) heating the water in the tank to approximately 95 degrees Celsius; (c) applying sufficient heat to the water in the tanks so as to cause boiling of the water in the tank within a predetermined first period of time; (d) measuring the boiling water temperature of the water in the tank; and (e) subtracting a predetermined temperature from the boiling water temperature measured in step (d) to arrive at the operating water temperature.

Abstract: A plectrum for a stringed musical instrument having a plurality of conductive strings is provided with a non-conductive body and a conductive tip. The conductive tip is sized so as to fleetingly contact a string when the string is plucked with a plectrum. The tip is electrically connected to a monitoring circuitry which provides a triggering signal each time the tip contacts any of the strings. A transmitter and receiver arrangement is provided to monitor the contact of the tip with the strings and generate the triggering signal. The triggering signal is in turn received by a signal processing apparatus which modifies the audio signal output from the stringed musical instrument under control of the triggering signal.