to Mrs. Clifford's pets-the flowers-and she asked
"If Maggie had not suggested the tub of water last nigh
oom with fear and trembling this morning, and whe
b remarked, quietly. "I put water in the root-cellar b
e, "I can't understand why the plants
e a college-bred man. You explain how th
ebb. If he could live long enough he'd coax from Nature all her secrets. He's the worst Paul Pry into her affairs that I
ledge, Burt, resemble
, see what you
from the plants, but before it can freeze it must give out one hundred and forty degrees of latent heat. The flower-room and root-cellar were therefore so much warmer during t
from freezing?" Alf aske
ds would soon become solid. But to return to the tub of water in the flower-room. The water, when placed there, was probably warmer than the air, and so would give out or radiate its heat until a thermometer, placed either in the room or in the water, would mark thirty-two degrees above zero. At this point the water would begin to freeze, but plants or vegetables would not. They would require slightly severer cold to affect them. But as soon as the water begins to freeze it also gradually gives out its latent heat, a
beneath the ice in the tub began to freeze slowly, the
g of these principles is of great practical value. If I could have waked up and placed another tub of water in the room at two or three o'clock, or else taken all of the ice out of the first one, the process of freezing and giving out heat would have gone on rapidly again, and none of the plants would have suffered. I have heard people s
have, then, the bett
to freeze, and the effect i
le collection of plants. I now see that the why and wherefore comes in very usefully. But please tell me why you
are composed chiefly of water, which fills innumerable little cells formed by the vegetable tissue. If the water in the cells is chilled beyond a certain point, if it becomes solid ice, it expands and breaks down the tissue of t
heat or sunlight dest
st. The part furthest away from the heat remains contracted, while the parts receiving it expand rapidly and unequally, and this becomes another cause for the breaking up of the vegetable tissue. The same principle is illustrated when we turn up the flame of a lamp suddenly. The glass next to the flame expands so rapidly that the other parts cannot keep pace, and so, as the result of unequal expansion, the chimney goes to pieces. Wit
said Leonard. "How is it that some plants are able
so much more hardy than others that seem stronger and more vigorous, even the microscope does not reveal. Nature has plenty of secrets that she has not yet told. But of all p
of a fellow Webb is. You cannot even sneeze without hi
id of me, Amy
s the qu
of excitement to the child. Her wonder grew and grew, for there was a foreign air about many of Amy's things, and, having been brought from such a long distance, they seemed to belong to another world. The severe cold continued, and only the irrepressible Burtis ventured out to any extent. When Alf's excitement over his
he same consideration as if she were one. Meanwhile she was shown that her presence cast no gloom over the family life, and she knew and they knew that it would be her father's wish that she should share in all the healing gladness of that life. No true friend who has passed on to the unclouded shore would wish to leave clouds and chilling shadows as a legacy, and they all felt that in Amy's case it had been her father's desire and effort to place her under conditions that would develop her young life happily and therefore healthfully. There is the widest difference in the world between cheerfulness and mirthfulness which arise from happy home life and peaceful hearts, and the levity that is at once unfeeling, inconsiderate, and a sure indicat