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and in proper size 11 Durability 12 Strength against crushing
and schist 26 Slate 27 Laterite 28 Trap and basalt 29 Gravel
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acid added alloy aluminium asphalt austenite Bessemer Process bricks brittle burnt called carbon steel cast iron cement cementite cent chemical chromium clay coat colour commonly concrete consists cooling copper corrosion creosote crushing cylinder diameter driers ductile durable electric Fat lime ferrite fibres fire glass glue hard hardening heat high temperatures hydraulic lime impurities kiln known layer limestone linseed oil manganese manufacture material melting metal method mixed mixture moisture molten mortar moulds nickel obtained ordinary oxide paint pearlite percentage pig iron pigments pipes plastics plate polish powder produced properties proportion quantity Red lead resins resistance reverberatory furnace rolled rubber sand sheets shown in Fig sieve silica slag slaked Solders sorbite specific gravity steel containing stone structure sub-continent suitable sulphur surface tensile strength thickness tiles timber tough tree turpentine types upto vanadium varieties varnishes white lead wood wrought iron zinc