#### Sentence Examples

• The hardness came back into his eyes and he looked away.
• It is an ironblack, opaque mineral, with metallic lustre; hardness about 6, sp. gr.
• But this " critical value " of the force is found to depend in an unexpected manner upon the hardness of the steel; the critical value diminishes as the hardness becomes greater up to a certain point, corresponding to a yellow temper, after which it increases and with the hardest steel becomes very high.
• A greater hardness is due to the presence of earthy impurities.
• The iron-bark of the eastern coast uplands is well known (Eucalyptus sideroxylon), and is so called from the hardness of the wood, the bark not being remarkable except for its rugged and blackened aspect.