Chapter 25 "A Thing"

Before the candela, one of the seven base units of the International System of Units, light intensity was measured in candlepower. The standard of 1 candle is defined by the use of special whale oil candles. The requirements for this standard candle are: 2.2 cm in diameter and burning 7.78 grams per hour.

Based on this calculation, a ton of shark ointment can be burned for about 14 years, and the grease can be refined from the shark's body.

However, to achieve such an ideal situation and allow it to burn for more than a thousand years, the demand for the number of sharks would undoubtedly be huge. Now the "mermaid ointment" candle has been burning for nearly a thousand years, so it is also said to be "indestructible for a long time."

"Shu Yi Ji" records that "there are beads in the South China Sea, which are the pupils of whales' eyes. They can be seen at night and are called night lights." The eyes of whales can shine like pearls, so there is a saying that