120 THE JOURNAL OF BOTANY 
more) are from photographs of actual experiments, and will be 
found a help in the arrangement of the apparatus. 
In Professor Green’s book we have the completion of the second 
edition of the Manual of Botany which appeared about six years 
ago as a re-issue in a more modern form of the late Professor 
Bentley’s Manual. The only important alteration, but that a some- 
what extensive one, has been the re-writing of the section on the 
as in the edition of 1896; the author follows the sequence of orders 
aps is the case, but it impresses the student less with the 
important characters of the group. We think it would have been 
better to have retained, in a shortened form, the diagnosis, and = 
as 
those less important orders, of which a student is never likely to 
see specimens, and which, moreover, are not necessary to an 
understanding of the main features of the system. The author has 
already gone some way in this direction by paying more attention 
to British orders, and introducing discussion on the morphology of 
the flower in particular ones; and we hope that in a subsequent 
edition he will proceed further. 5 
It is practically impossible to get a text-book up to date, and it 
is extremely difficult to avoid slips where every page, as is especially 
the case in a systematic account, is crammed with facts; and we 
have not made it our business to hunt for examples of this kind. 
e must, however, remind Prof. Green that his account of the 
secondary fertilization in Angiosperms, which, whatever it ma 
mean, helps towards the understanding of the two parallel sets. of 
developments which result from the union of the male cells wit 
the female gametophyte. 
Mr. Leavitt’s handy little volume has been prepared to meet 
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account of the subject of study. This method implies careful 
supervision by the teacher, or the student will achieve little else 
than the destruction of his material. 
