ocean. We cannot see its particles, but we do see the light reflected from them; and, I suppose, it is the differences in the appearances of the lighted reflections that make us conscious of the stillness or movement of the atmosphere on days when there is no wind. We need not be very sensitive to nature to notice these differences of the atmosphere at different seasons of the year; how, on certain winter days, the air seems absolutely motionless; while on other days it seems alert and sprightly; how in early spring it seems astir with gentle life, while in summer or autumn it may be alive with animation or heavy with drowsy languor.