Job Description:

• 1) Fills, shapes, seals, and marks glass tubes to fabricate thermometers, using vacuum tank, micrometer, gas burners, and handtools: Places thermometer tubes in vacuum tank filled with colored liquid and secures tank lid.

• 2) Turns handle to create vacuum in tank that causes fluid to fill tubes.

• 3) Holds end of filled tube over gas flame until glass changes color.

• 4) Inserts air bulb into unheated end of tube and squeezes air into tube to form thermometer bulb.

• 5) Rotates bulb in preset micrometer to attain specified size.

• 6) Holds open end of tube over flame to soften glass and seal tube.

• 7) Immerses tube in temperature controlled hot and cold water tanks to determine reference point for calibrating tubes.

• 8) Scribes marker at reference points, using file.

• 9) Heats and cools water in tanks to specified temperatures, using heater, ice, and master thermometer.

• 10) May blow and shape glass tubes used to make thermometers.