The most disgraceful cause of the scarcity [of remedies] is that even those who know them do not want to point them out, as if they were going to lose what they pass on to others.
The leading distinction in magnets is the sex, male and female, and the next great difference in them is the colour. Those of Magnesia, bordering on Macedonia, are of a reddish black; those of Breotia are more red than black; and the kind that is found in Troas is black, of the female sex, and consequently destitute of attractive power.
It [the earth] alone remains immoveable, whilst all things revolve round it.
![The most disgraceful cause of the scarcity [of remedies] is that even those who know them do not want to point them out, as if they were going to lose what they pass on to others.](http://cdn.quoteddaily.com/images/pliny-the-elder/the-most-disgraceful-cause-of-the-scarcity-of-remedies-is-that-even-those-who-know-them-do-not-want-to.jpg)
