HENSLOW’S BOTANICAL CHARTS. 
In the study of plants, when the parts looked for are com¬ 
plex or minute, it is a great help to the pupil to form before¬ 
hand a clear idea of what he is to look for. The illustrations 
of the book help him in this way, and teachers often prepare 
large colored diagrams for the same purpose. More fully to 
meet this need of schools and students, one of the last labors 
of Prof. Henslow’s life was to prepare a set of botanical charts. 
There was, perhaps, no other living man so competent to the 
task, as his thorough knowledge of the science, his experience 
as a lecturer to the Cambridge students when he was professor 
in that university, and his subsequent teaching of the parish 
children at Hitch am, qualified him to meet the wants of all 
grades of learners. He prepared a series of nine large sheets, 
and, as their publication was expensive, it was undertaken by 
the Science and Art Department of the English Educational 
Council. “Henslow’s Botanical Diagrams” have a high repu¬ 
tation for their scientific accuracy, their completeness of illus¬ 
tration, their judicious selection of typical specimens, and their 
skillful arrangement for the purpose of education. 
As nothing of the kind had been done in this country, and 
as Henslow’s series when imported is costly; and, especially as 
they are a most valuable help to the schedule method of teach¬ 
ing botany, I was desirous that the pupils of our schools in 
their efforts at self-teaching should as far as possible have the 
advantage of their use. The publishers of this book accordingly 
incurred the very considerable expense of preparing a revised 
edition of the English charts. This revision and reissue were 
the more necessary, as the foreign edition is compressed into 
