Iron ore {minerai, m.) is of a reddish colour

7. Copper, sih'er, and gold are more ductile than zinc and tin.

8. Why is mercury also called quicksilver? — Because it is liquid.

9. What {qu'est ce qui) causes it to lose its fluidity ? — A severe frost.

10. Are there not metals which are violent poisons ! (63, 29.)

11. Yes, arsenic, for instance {exemple, m.), is very deleterious {déh'lh-e.)

12. But most of them {la plupart) are also precious remedies {retnède,