The basic task in the design and development of I. C. Engines is to reduce the cost of production and improve the efficiency and power output. In order to achieve the above task, the engineer has to compare the engine developed by him with other engines in terms of its output and efficiency. Hence he has to test the engine and make measurements of relevant parameters that reflect the performance of the engine. In general the nature and number of tests to be carried out depend on a large number of factors. In this book only laboratory testing of I.C. Engines and the interpretation of performance results are described.

Colocasia is primarily grown for its starch riched edible corms and cormels. Leaves and petioles are also used as vegetable while the starch has industrial uses. It is grown as staples or subsistence crop throughout the tropics and subtropics. Corms and cormels are generally consumed after boiling or frying. In North East India, farmers use different parts of colocasia as pig feed. It is one of the vegetables which are most extensively consumed by the rural people. Hundreds of cultivars are available in different parts of the region. Wide variation in stature and growing habit exist among the cultivars. Therefore, an experiment was designed to study the variation and correlation in growth and yield parameters and the interrelationship between different characters of 20 selected germplasm of colocasia. The results obtained and the conclusions derived from this investigation are incorporated in this book.