. The cytology and life-history of bacteria. Bacteria. Preface to Second Edition THE second edition of this monograph inckides a considerable amount o{ new information which serves, for the most part, to confirm and expand the general theories of cytological structure and behaviour in bacteria which I advanced six years ago. hi particular, greatly improved demonstrations have been achieved of such, formerly rather problematical processes as gonidial reproduction, nuclear reduction, and the development of the flagella, and of such structures as the blepharoplast or the startlingly complex cross
. The cytology and life-history of bacteria. Bacteria. Preface to Second Edition THE second edition of this monograph inckides a considerable amount o{ new information which serves, for the most part, to confirm and expand the general theories of cytological structure and behaviour in bacteria which I advanced six years ago. hi particular, greatly improved demonstrations have been achieved of such, formerly rather problematical processes as gonidial reproduction, nuclear reduction, and the development of the flagella, and of such structures as the blepharoplast or the startlingly complex cross-walls which sub-divide a staphylococcus internally. I have continued to place the main weight of my arguments upon my own observations or upon information which I have been able personally to confirm, but have welcomed several remarkable contributions to knowledge in the form, for example, of Chapman and Hillier's electron micrographs of sections o( Bacillus ccrens, which prove, contrary to my previous belief, that the cross-wall is indeed a centripetal ingrowth, and the consummately skilful phase contrast studies of Tomcsik which, while demonstrating the profundity of my former ignorance of the nature of bacterial capsules, provide a gratifying confirmation of my hypothesis, based upon entirely different evidence, of the development of cell wall. Since the first edition was published there has also been a notable increase in the amount of corroborative evidence provided by studies in genetics, biochemistry and biophysics. The single, reductionally dividing chromosome of the vegetative nucleus, which has been the subject of the most lucid cytological demonstrations, has been entirely vindicated by the genetical studies of Witkin and o( Cavalli-Sforza and Jinks, after a period in which multiple, or even branched chromosomes, for the existence of which there is no acceptable cytological evidence, were at various times postulated by geneticists. And in a similar manner, the cytol
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectbacteria
