The influence of certain external factor
โ
Castle, E. S.
๐
Article
๐
1936
๐
Wiley (John Wiley & Sons)
๐
English
โ 438 KB
๐ 1 views
I6 is convenient to d e h e the steepness or inclination of a helix by the angle which it makes with the long axis of the structure. This can vary from 0" for a perfectly linear structure to 90" for an ideally circular one, such as a stack of coins.