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Conduits ou tuyaux d'air.

Conservation des hommes et des travaux.

Consistance de la roche (Différens degrés de). .
Couches...

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Couches de houille en selle, en jatte, en V, en
chevron, en cul de chaudron, etc.
Couches de moyenne épaisseur (Exploitation des)
Couches et filons puissans (Exploitation des). .
Couches minces (Exploitation des). .

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8 et suiv.

28 et suiv.

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Disposition des minerais dans l'intérieur de la terre.

Division du temps pour le travail.

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Exploitation des terres salées.

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(Petite).

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Machines à tirailles et à varlets en fer ou en bois,
mues par des roues hydrauliques ou autrement.
Machines à vapeur, appliquées à l'exploitation des
mines.

Manière de rapporter les opérations sur le papier.
Manière d'opérer dans les travaux.

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Prix des outils, de la poudre, des câbles, ma-

chines, etc..

Prix des bois de mine

Prix des ouvrages de mine dans différentes parties
de la France.

Puissance d'un filon, d'une couche .
Puits de recherche, ses dimensions

Puits artésiens.

Puits artésiens (Détails sur les). Dépenses approxi

matives

Puits ou caisse à filtrer.

578 et 579

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559-567

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