. The cytology and life-history of bacteria. Bacteria. INTRODUCTION usually employed in routine bacteriology, and the necessity for the employ- ment of more refined methods of examination has encouraged the study of eubacteria in a similar manner. The readily-demonstrable nuclear structures and beautiful and complex life-cycle of myxobacteria stimulated the search for the truth concerning the parallel structures and processes in those bacterial genera more commonly encountered in the laboratory. The studies of biochemists upon the nucleoproteins of bacteria have also contributed greatly to the
. The cytology and life-history of bacteria. Bacteria. INTRODUCTION usually employed in routine bacteriology, and the necessity for the employ- ment of more refined methods of examination has encouraged the study of eubacteria in a similar manner. The readily-demonstrable nuclear structures and beautiful and complex life-cycle of myxobacteria stimulated the search for the truth concerning the parallel structures and processes in those bacterial genera more commonly encountered in the laboratory. The studies of biochemists upon the nucleoproteins of bacteria have also contributed greatly to the increase in our knowledge of, and interest in, the problems of bacterial cytology. One of the most useful staining techniques tor the demonstration of the bacterial nucleus is a direct adaptation of a microchemical test, the Fculgen reaction, which has itself given much information upon the subject. Bacteria have recently come to be regarded as suitable material for genetical studies, and although little has so far been done to correlate genetical and cytological information, a gratifying degree of mutual support has already been achieved (Chapter X), and it is to be hoped that the interchange of information between these two branches of bacteriology may, in the future, prove as helpful to both as it has done in other biological fields. The information compiled in the following chapters has been obtained by classical microscopic methods, in most instances, but a considerable advance m the techniques of electron and phase-contrast microscopy, as applied to this subject, has in the last few years provided valuable confirmatory evidence on several points, and promises to do more. It should be emphasised that a reasonable degree of correlation between the results obtainable by different techniques must always be sought before too much weight is placed upon any one of these. The disagreements which have arisen in bacterial cytology have been surprisingly few. But almost all of thes
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