Biological Techniquesâ has been written for undergraduate, postgraduate students opting biological, pathoological, biochemistry, biotechnology courses. It deals with the various types of fixatives, stains and techniques used in the fields just stated. It is basically a simple cookery book, but like all good cookery books this volume should remain on the bench until its useful life is over volume should remain on the bench until its useful life is over and should remain on the bench until its useful life is over and should never become embedded in the library shelf. This book aims at an explanation of the process involved in the preparation of tissues for microscopical study.