The colouring principle of logwood exists in the timber in the form of a glucoside, from which it is liberated as haematoxylin by fermentation.
Le principe colorant du bois de campêche se trouve dans le bois sous forme de glucoside, dont il est libéré sous forme d'hématoxyline par fermentation.
In the great Italian tunnel the machines were moved by compressed air, which, being liberated when it had done its work, supplied the lungs of the workers with fresh oxygen.
Dans le grand tunnel italien, les machines fonctionnaient à l’air comprimé qui, libéré après avoir accompli son travail, apportait de l’oxygène frais aux poumons des ouvriers.