Question

how did priestly light the candle from outside.

Answer 1

he put a plant called mint inside the bell jar ...as we know mint plack produces oxygen....the ming plant produced oxygen which was useful for the lightning of the candle 

Answer 2

Answer:

when the candli stopped burning in the bell jar , he placed a mint plant inside the jar . he found that the mouse stayed alive and the candli continued to burning when introduced a lighted candle

by this experiment it is proved that plants can create oxygen , allowing firebto burn and animals to breathe