Word: layerings
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...lenses must be curved on their inner (concave) side almost but not exactly to match the curve of the eyeballs. Nor may their optical curve be exactly that of ordinary eyeglasses. Contact lenses are held against the eyeballs by the capillary suction of tear water. Thin though the layer of tears is, it has an optical effect which the ophthalmologist must allow for in writing his prescription...
Above the upper reaches of the stratosphere, higher than man has ever studied, stretches the Kennelly-Heaviside layer of ionized ether which acts as a conductor (or reflector) of radio waves. If man could study these regions he might gather valuable meteorological data, possibly discover new air travel lanes for aircraft of the future...
...four normal children, left school at the age of nine to take care of her. He could make his mother understand him by contorting his face into significant expressions. At 13 he went to work as a guide to tourists on Pike's Peak. Later he was carpet-layer, stage hand, vaudevillist. He married his singing and dancing partner; their son is a lawyer in Hollywood...
Last week at Farnborough Aerodrome, the British Air Ministry tested a simple device to overcome the fog hazard in flying. A tethered balloon was floated 100 yds. above a 90-ft. layer of fog and one-half mile from the field. A plane was fitted with a trailing weight suspended by a few feet of wire. Approaching the hidden field, the pilot oriented himself by the known position of the balloon, put his ship into a glide of prescribed angle, leveled off when a red light on his instrument board told him the suspended weight had touched ground...
Waterspouts and tornadoes are caused by a condition of unstable equilibrium in the atmosphere. A warm, damp air layer close to land or sea attempts to rise through a layer of cool, dry air. The warm air literally breaks a hole in the cooler air, rushes upward. Passing through the hole it assumes a whirling motion. The centrifugal force of the column develops a partial vacuum on the inside...