Footprint fortune-telling formula _ What can footprints calculate?

The relationship between height and foot length

Height (cm) = Footprint length (cm) ×6.876.

According to the size of footprints, "footprint experts" can infer the height of criminals, which is scientific. After measuring the height of many people and the length of footprints, scientists came up with a formula to calculate the height from the length of footprints: height (cm) = footprint length (cm) ×6.876.

The relationship between foot length and height shows that the growth of body bones is related to the growth of height. When the leg bones grow, both the foot bones and the phalanges will grow to varying degrees. Therefore, when the body grows taller, the limbs, soles and palms will also "grow up".

Related information:

From 65438-0987-88, China State Sports Commission organized a study on the evaluation standard of China people's bone age, and formulated the CHN method of China people's carpal bone development standard. 1992 was approved as the industry standard of People's Republic of China (PRC), and was officially promulgated and implemented.

When shooting X-ray of carpal bone, the fingers of the left hand are separated, the palm is pressed down on the X-ray box, the hand is straight and in line with the forearm, and the X-ray lens is aimed at the third metacarpal bone, about 90 cm away from the back of the hand. X-ray should include not only all the hand and wrist bones, but also the distal radius of 3 ~ 4 cm.

The development degree of radius, metacarpal bone, phalanx and wrist 14 bone was evaluated by CHN method. Add up the grade scores of 14 bones, and then look up the table to evaluate the bone age. After systematic training and repeated practice, the error of CHN method in evaluating films is not great.