The telluric helix was given by (a) De Chan Courtois (b) Newlands (c) L. Meyer (d) Mendeleev The telluric helix was given by (a) De Chan Courtois (b) Newlands (c) L. Meyer (d) Mendeleev November 8, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,