The scale of hardness from 1 ( talc ) to 10 ( diamond ) was devised by Fredrich Mohs and should be included in the book on rocks and minerals from the library.
(The scale of hardness from 1 ( talc ) to 10 ( diamond; was devised; by Fredrich Mohs) (The scale of hardness from 1 ( talc ) to 10 ( diamond; should be included; in the book on rocks and minerals from the library)
The scale of hardness from 1 ( talc ) to 10 ( diamond The scale of hardness from 1 ( talc ) to 10 ( diamond
was devised should be included
by Fredrich Mohs
in the book on rocks and minerals from the library