The following figure illustrates the knitting action of a V-bed hand flat machine and the another figure shows the underside of the cam carriage and the cams forming the tracks that guide the needle butts through the knitting system.
Milankovitch cycles are the collective effect of changes in the Earth 's movements upon its climate, named after Serbian civil engineer and mathematician Milutin MilankoviÄ.
There is a 19 year astronomical cycle which has been used to make a very accurate solar-lunar calendar. Hillel's Hebrew calendar is based on this Metonic Cycle of 19 years = 235 lunar months. Since its establishment in 359 C.E. it has approximated the passages of the sun and moon quite well. The Metonic cycle. It was discovered by the Greek mathematician, astronomer, geometer, and engineer Meton of Athens.