The Galileo thermometer is made of a sealed glass cylinder containing a clear liquid (usually paraffin or ethanol) and a series of sealed glass bulbs with different densities. This stylish weather station is fitted with a timepiece and a barometer for measuring atmospheric pressure.
Galileo, the famous Italian physicist, discovered that the density of a liquid changes in proportion to its temperature. As the temperature increases, the density of the clear liquid decreases causing the bulbs to sink; and vice versa. Tags attached to the bulbs then allow you to determine the temperature.
The temperature is typically read from an engraved metal disc on each bulb. Usually a gap separates the top group of bulbs from the bottom group of bulbs, lowest ball of the top cluster determines the temperature. If a bulb is free-floating in the gap, then its tag reading would be closest to the ambient temperature.
Warning: This product is not a toy. Keep away from children. Contains Paraffin oil/Light wax oil. In case of breakage: If liquid becomes in contact with skin, rinse with plenty of water and ensure the room is well ventilated as the oil has a strong odour. Use gloves to clean up spills. Do not ingest. If ingested call your nearest poison line and wash out mouth with water.
WARNING - KEEP BATTERIES OUT OF REACH OF CHILDREN
Swallowing may lead to serious injury in as little as 2 hours or death, due to chemical burns and potential perforation of the oesophagus.
If you suspect your child has swallowed or inserted a button battery immediately call the 24-hour Poisons Information Centre on 13 11 26 for fast, expert advice.
Examine devices and make sure the battery compartment is correctly secured, e.g. that the screw or other mechanical fastener is tightened. Do not use if compartment is not secure.
Dispose of used button batteries immediately and safely. Flat batteries can still be dangerous.
Tell others about the risk associated with button batteries and how to keep their children safe.
NOTE: The 24-hour Poisons Information Centre is the correct first response in Australia 13 11 26.