advantages of heating the Open air. 
5 
of property, especially the wealthy Jews. If what is alleged by 
our correspondent be true, it cannot fail in being injurious to 
gardening as it is unjust to gardeners ; but we would require to 
have the allegations well certified before inserting them in our 
pages. The remaining part of the letter we give, as it contains 
only a speculation, and one not unworthy of being considered.] 
TO THE EDITOR OF THE FLORISTS JOURNAL. 
Sir, —My attention has been often called to the fact, that though 
the productions of all climates are cultivated in modern Europe, yet 
there is no one place, even in a national garden, where an attempt 
has been made to arrange and grow them in a state resembling 
that of nature. It is true that the climate of Britain is not so well 
adapted for the growth of exotics, as that of the south and even 
the central parts of Europe ; because, though the temperature is 
milder during winter than in some of those countries, yet it is 
more injurious to tender vegetation. 
It has been observed, that many plants are destroyed, or seri¬ 
ously injured, by a less degree of cold in Britain than is necessary 
for producing the same effect in other countries. Roses in France 
may be quoted as an instance in which tender plants bear a lower 
temperature in that country than they do in Britain ; and the 
cause, though but little attended to, is eminently worthy of the 
attention of all florists, for our more delicate open air plants are 
destroyed upon nearly the same principle as the French roses, and 
the infertility of both is owing to the same cause, though modified 
a little by the different habits of the several genera. In America 
we have still more remarkable instances of this endurance of cold, 
and we can trace it to the same cause, namely, the dryness of the 
atmosphere. In France, and especially in America, the rains 
upon the low grounds, and the snow upon the cold and elevated, 
fall more heavily than they do in Britain ; but they are sooner 
exhausted, and in the intervals the air is much more dry. 
Now it is this superior dryness of the air which preserves plants 
until the temperature is considerably lower than that at which 
they begin to be destroyed in Britain. This arises from the 
moisture of the air in the latter country being always nearer the 
point of saturation, and thus a moderate depression of tempera¬ 
ture occasions a deposit of water in the' form of dew, or simply as 
