68 
M. G. Thoday. 
destruction during the palmy days when the Aigoual was a shining 
mass of mica schist, and its present insignificant attempts, is 
instructive. 
But the aims of L’ Hort de Dieu are wider yet. There is an 
experimental kitchen garden, and a series of plots designed for the 
culture of ornamental plants. And finally there is a series of 
pastures ranging from the original stony wilderness, through plots 
from which the stones have been removed, irrigated plots, plots 
manured by grazing animals, to plots scientifically treated with 
artificial manures. The vegetable garden, the ornamental plots 
and the experimental pastures are primarily designed to show a 
very ignorant highland population what can be done with the 
means at its disposal. 
One who has enjoyed, as has the present writer, a month’s 
hospitality in this veritable garden of the gods, must find it difficult 
to refrain from launching into a panegyric of all which its name 
calls up in his mind. But no praise could seem otherwise than 
cold to the writer and fulsome to the reader. It may be added 
however that the opportunities for work are as varied and abundant 
as the life is simple and refreshing. 
The above description is all too inadequate, but may serve to 
bring to the notice of our British botanists, a garden which is not 
only a model of what such a garden ought to be, but also a striking 
example of the results attainable without great means, but with 
the qualities exemplified by Darwin’s motto—It’s dogged does it: 
and of a most admirable catholicity of aim and ideals. 
NOTE ON AN ARTIFACT IN THE WALLS OF THE 
CELLS OF THE MEDULLA IN THE LAMINARIACE^E. 
By M. G. Thoday (formerly Sykes). 
|Text-Figs. 13 and 14]. 
Girton College, Fellow of Newnham College, Cambridge. 
I T was recently pointed out to me by Miss E. R. Saunders, that 
in a section of Laminaria digitata in the collection at the 
Balfour Laboratory, Cambridge, the elements of the medulla 
showed a most characteristic reticulate thickening on their longitu- 
tudinal walls. 
This reticulate thickening (see Figs. 13 and 14) was well 
developed in the walls of both the primary pith filaments 1 and the 
hyphae, but was not present in the much thinner walls of the 
secondary sieve tubes. 1 The “ thickenings ” extended even into 
1 For use of terms see Sykes, M. G., “ Anatomy and Histology of 
Macrocystis pyrifera and Laminaria saccharina" ; Ann. of Bot., 
XXII., 1908, pp. 309, 310 and 300-303. 
