References in classic literature ?
If a number of equal spheres be described with their centres placed in two parallel layers; with the centre of each sphere at the distance of radius x sqrt(2) or radius x 1.41421 (or at some lesser distance), from the centres of the six surrounding spheres in the same layer; and at the same distance from the centres of the adjoining spheres in the other and parallel layer; then, if planes of intersection between the several spheres in both layers be formed, there will result a double layer of hexagonal prisms united together by pyramidal bases formed of three rhombs; and the rhombs and the sides of the hexagonal prisms will have every angle identically the same with the best measurements which have been made of the cells of the hive-bee.
The bees, however, did not suffer this to happen, and they stopped their excavations in due time; so that the basins, as soon as they had been a little deepened, came to have flat bottoms; and these flat bottoms, formed by thin little plates of the vermilion wax having been left ungnawed, were situated, as far as the eye could judge, exactly along the planes of imaginary intersection between the basins on the opposite sides of the ridge of wax.
The work of construction seems to be a sort of balance struck between many bees, all instinctively standing at the same relative distance from each other, all trying to sweep equal spheres, and then building up, or leaving ungnawed, the planes of intersection between these spheres.
Thus, as I believe, the most wonderful of all known instincts, that of the hive-bee, can be explained by natural selection having taken advantage of numerous, successive, slight modifications of simpler instincts; natural selection having by slow degrees, more and more perfectly, led the bees to sweep equal spheres at a given distance from each other in a double layer, and to build up and excavate the wax along the planes of intersection.
As the two came down the trail all unconscious of impending danger, the man was explaining that they must be very close to the point at which the plane had landed.
His only 'evidence' for the missile theory are descriptive similes used by witnesses who attested to seeing a plane but who compared the plane to a missile.
Another recent study on the leakage of UCN [2] from a bottle showed the subcritical energy neutrons anomalously transmitted through an aluminum window, in contradiction to the simple expectation from plane wave theory that predicts essentially no transmission.
Then the plane lifted its nose and abruptly accelerated (changed velocity over time) up the first arc.
A body can be tangential to another along its plane that is its extremity, and a plane is tangential to another through a line which is its exclusive extremity, and a line is [said to be] tangential to another line through the point that is its exclusive extremity.
Over 600 muscles comprise this prodigious network, many of which are compartmentalized into three distinct anatomical planes (check the illustration):
The plane sells for $247,000, compared to $230,000 for gas-powered crop dusters.
He saw my plane heading straight toward the heavy overcast.