Diametre

Only a few year ago, a beauty equipped for conquest was a heterogeneous combination of incoherent forms, which nature could never have united in one animal, nor art blended in one composition : it consisted of a head, disguised so as to resemble that of no living creature, placed upon an inverted cone, the point of which rested upon the centre of the curve of a semieliptic base, more than three times the diametre of its own.

The value of a fleece is determined by fibre diametre, lustre, softness, freedom or near freedom from kemps, and clean yield.

The girth, radial diametre, percentage of sapwood and heartwood and percentage of bark at BDH are given in Table 1.

A cone of 90 mm base diametre and 90 mm generator length is resting on ground.

Because the area occupied by an image is proportional to the square of the focal length of the lens, the light intensity over the image area is directly proportional to the diametre of the lens and inversely proportional to the square of the focal length.