Taking one blazing stick, and starting out as for a journey, he showed that the fire gradually went out.

Then he returned to the fire and took two large pieces, and started, keeping them so crossed that the parts on fire were always in contact.

In this way, as he showed them, fire could be kept in for a very long time; and that, if two brands were taken from each fire, there would be little difficulty in keeping fire perpetually.
Finally he showed them how, in case of losing fire in spite of all these precautions, it could be recovered by means of friction.

He took two pieces of dried wood; one being very hard grained, and the other much softer.

Of the former he cut a stick of about a foot long and an inch round, and pointed at both ends.