( 193 ) 
NEW BOOKS, WITH SHOUT NOTICES. 
The Micrographic Dictionary : a Guide to the Examination and In- 
vestigation of the Structure and Nature of Microscopic Objects. Third 
edition. By J. W. Griffiths, M.D., assisted by the Rev. M. J. Berke- 
ley, M.A., F.L.S., and Rupert Jones, F.G.S. London : Van Voorst. 
1872. Parts III., IV., V., VI., VII., and VIII.— This excellent work 
continues, though slowly, to make its appearance, and we must say 
that though in some few instances the text is not sufficiently altered 
or added to, in most cases the additions made in point of reference 
sufficiently counterbalance this otherwise defect. This is shown more 
particularly under the head of Angular Aperture, in which we find 
an omission of most of the facts relating to the aperture highest and 
lowest of immersion glasses. This, however, will be forgiven when 
the reader remembers that for a great many microscopists it is still 
an undecided point, and also from the fact that all the references to 
the several papers which have appeared in this journal are to be found 
given. Notwithstanding this want of reference to immersion lenses, 
the article on Angular Aperture is fully given and the explanations 
are very plainly stated. The classification of the animal kingdom, 
however, requires revision ; the term Radiata should not have been 
admitted in so late a publication, and the Coelenterata should not 
have been given such an inferior position ; Annulosa too should have 
taken the position of Articulata, and the Bibliography might have 
been more fully given. The section of Aphides seems to have been 
carefully done, and so also are Arachnida, Arteries, Ascomycetes, 
Batrachospermum ; Blood corpuscles, as to their measurement and 
constitution ; Bone, capitally illustrated ; Bursaria ; Cambium ; Cell, 
very good, if not best in the volume, but that reference to Huxley’s 
able paper in the ‘ Med. Chir. Rev.’ is omitted ; Chalk, excellent ; 
Characese, Chlorophyll, Ciliee, Closterium, Coccolitlis, Coal, and lastly 
Confervoidere, which completes the eighth number, but is not yet 
finished. These articles are all admirable, and where information is 
not distinctly given, the references to it are abundantly supplied, so 
that the reader may inform himself to the utmost on each subject 
which he takes up. Of course, there are deficiencies in some of the 
papers, but then we cannot consider these till the volume is com- 
pleted, as there are many occasions of giving information which 
might or might not be placed under a single heading. All we can say 
is that the work so far meets our desires, and that we doubt not, it 
will be even better in the future numbers. 
