The first attempt to deduce the general equation of equilibrium and vibration of elastic solids was made by Navier (1785-1836) in a remarkable memoir read on May 14, 1821, see Sokolnikoff (1946). This date marks the birth of the mathematical theory of elasticity. Starting with the picture of mathematical interactions in which the force acts along the line joining two particles and are proportional to the change in distance between them, Navier deduced set of three macroscopic differential equations for the components of displacements in the interior of an isotropic elastic solid. Navier's...

Rh575 is a member of Xanthene group of Laser dyes. The laser dyes behave differently in different surroundings affecting the performance of a dye laser.Therefore it is important to study the effect of surroundings on laser dyes.Solvents, solid hosts and water impurity are the most commonly used surroundings for laser dyes. This book represents the study of effect of all above said surroundings on Rh575.

This book is about the endophytic fungi found in Triphala trees viz. T. chebula, T. bellerica, Emblica officinalis of central India. Detail study was done on their seasonal occurrence, on the age of the leaf and on different sites of Achanakmar-Amarkantak Biosphere of central India. As it is known that endophytes resides within the living tissues of host plants without producing any symptoms of disease, it is important to study them in medicinal plants.