18. But if every particle of water attaching itself to air, brings with it a particle of common fire, the repulsion of the air being assisted and strengthened by the fire, more than obstructed by the mutual attraction of the particles of water, the triangle dilates, and that portion of air becoming rarer and specifically lighter rises. 19. If the particles of water bring electrical fire when they attach themselves to air, the repulsion between the particles of water electrified, joins with the natural repulsion of the air, to force its particles to a greater distance, whereby the triangles are dilated, and the air rises, carrying up with it the water. 20. If the particles of water bring with them portions of _both sorts_ of fire, the repulsions of the particles of air is still more strengthened and increased, and the triangles farther enlarged. 21. One particle of air may be surrounded by twelve particles of water of equal size with itself, all in contact with it; and by more added to those. 22. Particles of air thus loaded would be drawn nearer together by the mutual attraction of the particles of water, did not the fire, common or electrical, assist their repulsion. 23. If air thus loaded be compressed by adverse winds, or by being driven against mountains, &c. or condensed by taking away the fire that assisted it in expanding; the triangles contract, the air with its water will descend as a dew; or, if the water surrounding one particle of air comes in contact with the water surrounding another, they coalesce and form a drop, and we have rain. 24. The sun supplies (or seems to supply) common fire to all vapours, whether raised from earth or sea. 25. Those vapours which have both common and electrical fire in them, are better supported, than those which have only common fire in them. For when vapours rise into the coldest region above the earth, the cold will not diminish the electrical fire, if it doth the common. 26. Hence clouds formed by vapours raised from fresh waters within land, from growing vegetables, moist earth, &c. more speedily and easily deposite their water, having but little electrical fire to repel and keep the particles separate. So that the greatest part of the water raised from the land is let fall on the land again; and winds blowing from the land to the sea are dry; there being little use for rain on the sea, and to rob the land of its moisture, in order to rain on the sea, would not appear reasonable. 27. But clouds formed by vapours raised from the sea, having both fires, and particularly a great quantity of the electrical, support their water strongly, raise it high, and being moved by winds may bring it over the middle of the broadest continent from the middle of the widest ocean. 28. How these ocean clouds, so strongly supporting their water, are made to deposite it on the land where 'tis wanted, is next to be considered.