Journal of the Association of Engineers, India

D. N. Ghose ¹

Affiliations
1 Don Bosco Polytechnic, IN

Abstract

In our country, wastes are taken as wastes and we never think of possibilities of recovery from the wastes which are coming out from factories. We show it as a loss. But, in America and other developed countries, information is available on salvage practices in the industrial wastes. Many recoveries are profitable and they reduce the strength and harmful nature of sewage. Moreover, liquid industrial wastes are generally run into rivers which cause river pollution. This river pollution is surely unwanted in a civilised country. So, if we take out certain ingredients as recoveries from the liquid wastes, the sewage will loose its concentration as well as its polluting nature.

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D. N. Ghose ¹

Affiliations
1 Department of Civil Engineering, Don Bosco Polytechnic, Calcutta, IN

Abstract

The City of Calcutta is no doubt a city of problems. Until now, many a thinker tried to solve the problems with a view to make the city life smooth. But, the problems were not overcome. The first and foremost problem is public health hazards.

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D. N. Ghose ¹

Affiliations
1 Department of Civil Engineering, Don Bosco Polytechnic, IN

Abstract

In science and technology, Nomographs (also known as Nomograms, Abacs, and Alignment charts) have won much favour during the past two decades. Nomographs are most advantageous when only an approximate result, say within a few per cent, is needed and the same formula is repeatedly required for several sets of values of variables. Very few formulae are outside the scope of the Nomographs. Once the theory is understood, practical short cuts are made to reduce the time required to design an alignment chart For ease of operation and to save time, Nomographs are always preferred by practical engineers. The material presented here is intended to provide a good working knowledge of the fundamental principles of nomography.

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