12 GARDENING INDOORS AND UNDER GLASS 
ing the glass, as a “dead air space’ must be left 
between. Where there is danger of freezing, a 
kerosene lamp or stove left burning in the room 
overnight will save them. Never, when the temper- 
ature outside is below freezing, should plants be left 
where leaves or blossoms may touch the glass. 
As with the problem of light, so with that of 
temperature——the specially designed place for 
plants, no matter how small or simple a little nook 
it may be, offers greater facility for furnishing the 
proper conditions. But it is, of course, not impera- 
tive, and as I have said, there is probably not one 
home in twenty where a number of sorts of plants 
cannot be safely carried through the winter. 
MOISTURE 
It would seem, at first thought, that the proper 
condition of moisture could be furnished as easily 
in the house as anywhere. And so it can be as far 
as applying water to the soil is concerned; but the 
air in most dwellings in winter is terribly deficient 
in moisture. The fact that a room is so dry that 
plants cannot live in it should sound a warning 
to us who practically live there for days at a time, 
but it does not, and we continue to contract all sorts 
of nose and throat troubles, to say nothing of more 
serious diseases. No room too dry for plants to 
live in is fit for people to live in. Hot-air and steam 
heating systems especially, produce an over-dry con- 
