1000. The nitrogen-organism on the contrary with the salts and calcareous earths; thus we have silicious organisms and calcareous organisms; Inflammable organisms and salt organisms. From this it is already clear, that the planetary or primary organism is not general, nor indefinite, but the _plant_; for no General or Indefinite has existence. The solar or quadri-elementary organism admits in like manner of being recognized as _animal_. This is the philosophical deduction. But there is also a physiological, which conducts to the same result. 1001. The mucus-vesicle can feasibly pass into two kinds of condition only. It either remains in the water, or is cast upon the shore, or in the mud. In the last case it continues to lie, and is only supplied with light, and oxydized by the air upon the upper side; in the first case, on the contrary, it rolls about constantly in the water, and is alternately illumed and oxydized upon all sides. The first vesicle thus obtains a single axis from above downwards, between light and darkness; the second on the contrary gains a multitude of axes from without inwards, where it is alone dark and deoxydized. The first is thus devoid of any middle point, and finds its centre of gravity only in the middle of the earth, while the latter acquires its centre of gravity in its Interior, and this renders the Interior polar towards all points of the circumference. The plant is only one axis, or from having no middle point, is properly only one radius, which has its centre in the centre of the earth; the animal is an infinity of axes or radii, which concur or converge in the creature itself; the plant is an inverted cone, the animal an infinity of cones or a globe. 1002. Thus the planetary organism originates, if the primary vesicle having been taken out of the water is given up to the earth, to immobility and to _darkness_. But the light-organism arises, if the primary vesicle continue in water, or in the Moveable and Diaphanous. Here then in their genesis an essential difference is declared between the two organic worlds. Planetary organism originates, if the vesicle develops itself apart from the water, in which case it is withdrawn on one side from the light; but the light-organism originates if it remains in water itself, where it can be supplied on all sides with light. The essence of both is expressed by the names _darkness_-organism and _light_-organism.