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11. The first and the primary question for consideration is as to what is the meaning of a 'metallurgical industry'.

The term 'metallurgy', as defined in the Engineering Encyclopedia is "the art of extracting metals from their crust and the term has, by custom, been restricted to the commercial method used as opposed to those which are employed in the laboratory".

In the Encyclopedia of metallurgical terms by Tootleman, published by Longmans, London, the term 'metallurgy' is defined to embrace "the practice and science of extracting metals from their ores, the refining of crude metal, the production of alloys and the study of their constitution, structure and properties and relationship and physical and mechanical properties to thermal and mechanical treatment of metals and alloys."

Colins concise encyclopedia defines 'metallurgy' as "science of metals including their extraction from ores and purification, formation of alloys and study of their properties and behaviour."

In the Random House Dictionary, the word 'metallurgy' is defined as "the technique or science of separating metals from their ores; the technique or science of making and compounding alloy; the technique or science of working or retreating metals so as to give them certain desired shape or properties."

He referred to Mc-Grew Hill Encyclopedia of Science and Technology, according to which, metallurgy is "the technology and science of metallic materials. Metallurgy as a branch of engineering is concerned with the production of metals and alloys, their adaptation to use and their performance in service. As a science, metallurgy is concerned with the chemical reactions involved in the processes by which metals are produced, and the physical, and mechancial behaviour of materials."

He also referred to the New Encyclopedia Britannica (15th Ed.). It says that "metallurgy is the science of extracting metals from their ores, refining, purifying and working them, mechanically or otherwise, to adapt them to use. It is also concerned with the chemical and physical properties of metals, their atomic and crystalline structure, the principles of combining them to form alloys, the means for improving or enhancing their properties for particular applictions, and the relations between properties, structures and uses. Further, it includes the thermal and mechanical processing of metals as materials of manufacture. According to it, metallurgy is a particularly broad subject, its scope overlapping many other sciences and technologies, such as physics, chemistry, mining, mechanical and chemical engineering, economics and manufacturing.