It is used during daylight hours. The balloon is filled to such degree that its ascent rate is known. By measuring the time period between the start of the balloon and the moment it hides in the cloud can be determined the height of the cloud base.
imbrication lines (imâ³bro brÃ´Â´ika shÉn) , lÄ«nz.n pl. 1 the seams which are formed by overlapping layers of tissue in order to close a surgical. wound. 2 slight mesiodistal ridges in the cervical third of a. tooth
Isometric Lines: The lines parallel to the isometric axes are termed isometric lines. The lines CD, CB etc are examples of isometric lines. Non-isometric Lines: The lines which are not parallel to isometric axes are termed non-isometric lines. The BD is an example.