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Of what use are the arteries and veins in your body?

What circulates through your body? And what in the leaf?

Unless your body received nourishment, could the blood circulate in it? And whence is the sap which circulates in the leaf supplied ?

We have observed the veins in the leaf, and considered the purpose they serve ; do you know what more the leaf has ? [The leaf contains an abundance of pores ; through these it breathes, and receives moisture which refreshes the tree.*]

What is the use of the leaf to the tree?

And of what use are the leaves of the tree to man?

Would this single leaf be missed from the tree? But how would the tree be affected, if we were suddenly to strip it of all its leaves ?

Is the tree ever deprived of its leaves without dying? When? And how is the approach of a change indicated ?

Who has taught us to derive spiritual improvement from these appearances of nature? See Matt. xvi. 2,3; Mark xiii. 28, 29; Luke xiii. 6-9.

What is the time of the leaf?

* The Teacher may try to find a leaf in which the pores may be observed with the naked eye ; (the Hypericum per, foralum, for instance, has transparent glands or pores which are very visible,) or he may shew them the pores of different leaves through a microscope.

When did the leaf first appear?
What causes it to fall from the tree ?

Does no leaf fall from the tree before the winter? What reflection may this suggest ?

Do you remember the comparison, Isaiah Ixiv. 6?

When the leaf falls, what becomes of it?

Does it lose its form as a leaf? Does it lose it at once ?

What do we mean by its corrupting ?

[When we speak of a substance corrupting, we mean, that its parts are decomposed.]

The parts of the leaf then, are gradually decomposed, and it has been found that they are changed into a species of air (carbonic acid gas): this air is again absorbed by other vegetables-these in their turn corrupt, and undergo the same process.-A revolution is thus continually taking place in the parts of Creation.

We said that when the leaf corrupts, its form is lost: but is the matter of the leaf lost ?

No sort of matter is ever lost; it may undergo various changes, it may pass through different forms, but the essence still subsists.--The same God who created every particle of matter, continues to uphold it through all its revolutions.*

* No power but that which created can destroy. Man may destroy the form, he may change the substance, but he cannot annihilate one single particle of matter. It is worthy of re. mark, that in what appears to us the most complete mode of destruction, that by fire, the substance is ouly changed from a grosser to one more refined.

We said that the time of the leaf is from Spring to Autum, The tree loses all its leaves in Autumn; will another generation succeed?

Will not fresh leaves appear in the Spring ?

Will not these look beautiful for a time, then change their colour, fall, and decay?

Of what may these successive changes remind

us ?

Have not the generations of men a season?

Do they not flourish for a time, and then decay?

And is not one generation of men succeeded by another?

Look for a moment upon the multitude of leaves on that tree-they are now in beauty-in a little time the chilling rains will fall, the sweeping blasts of Autumn will come, and not ope of those which you see will remain. In the Spring, fresh leaves will shoot forth, will have their season of beauty, and in their turn decay : and this will be the case till the tree itself shall be no more.

So is it with the generations of men-look around you; you will see many gay, and healthy, and blooming soon their autumn will come, their decay, their death : their place shall“ know them no more”-others shall succeed them, shall have their season of youth and bloom, and shall be removed like the former generation. Thus shall it be till the earth itself shall pass away. (2 Pet. iii. 10; Rev. xx. 11; xxi. 1.)

Since then, we all “fade as the leaf,” and ubide not here, let the best season of life be spent in preparing for a state where there is no decay.-Let us turn from the view of the perishable leaf before us to the contemplation and pursuit of that “tree of life," whose healing leaves shall be ever verdant in the Paradise of God. (Rev, xxii. 2.)

LILY OF THE VALLEY.

Do

you know the name of this flower ? How may it be distinguished from other flowers ?

Examine the blossom. What is within the blossom?

How many stamens?
What is in the midst of the stamens?

Is the pistil longer or shorter than the stamens ?

Is there more than one flower on the stalk?

Is the number of stamens the same in each flower?

To what are the stamens affixed ?
And to what are the petals affixed ?
Has the flower a calyx ?

Describe the form of the blossom. What do you observe at the edge ?

What is at the base of each of the flowerstalks?

Of what shape are the flower-scales ?

What is the colour of the flowers ? Are they uniformly white ?

What more has the plant?-Of what colour and form are the leaves ?

What direction have the flower-stalks? Are they straight?

Do they grow out of the stem on every side ? On which side?

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