"That's a question I am unable to answer. It cannot be the amount of material stored up in the cotyledons, or embryo seed leaves, for small seeds like the beet and cucumber will retain their vitality ten years, and lettuce, turnip, and tomato seed five or more years, while I do not care to plant large, fleshy seeds like pease and beans that are over three years old, and much prefer those gathered the previous season. The whole question of the germinating of seeds is a curious one. Wheat taken from the wrappings of an Egyptian mummy has grown. Many seeds appear to have a certain instinct when to grow, and will lie dormant in the ground for indefinite periods waiting for favorable conditions. For instance, sow wood-ashes copiously and you speedily have a crop of white clover. Again, when one kind of timber is cut from land, another and diverse kind will spring up, as if the soil were full of seeds that had been biding their time. For all practical purposes the duration of vitality is known, and is usually given in seed catalogues, I think, or ought to be." "Some say that certain fertilizers or conditions will produce certain kinds of vegetation without the aid of seeds--just develop them, you know," Leonard remarked. "Develop them from what?" "That's the question." "Well, I think the sensible answer is that all vegetation is developed from seeds, spores, or whatever was designed to continue the chain of being from one plant to another. For the life of me I can't see how mere organic or inorganic matter can produce life. It can only sustain and nourish the life which exists in it or is placed in it, and which by a law of nature develops when the conditions are favorable. I am quite sure that there is not an instance on record of the spontaneous production of life, even down to the smallest animalcule in liquids, or the minutest plant life that is propagated by invisible spores. That the microscope does not reveal these spores or germs proves nothing, for the strongest microscope in the world has not begun to reach the final atom of which matter is composed. Indeed, it would seem to be as limited in its power to explore the infinitely little and near as the telescope to reveal the infinitely distant and great. Up to this time science has discovered nothing to contravene the assurance that God, or some one, 'created every living creature that moveth, and every herb yielding seed after his kind.' After a series of most careful and accurate experiments, Professor Tyndall could find no proof of the spontaneous production of even microscopic life, and found much proof to the contrary. How far original creations are changed or modified by evolution, natural selection, is a question that is to be settled neither by dogmatism on the one hand, nor by baseless theories on the other, but by facts, and plenty of them."