2h

Updated: May 10, 2025

Both of the pure groups have therefore reappeared in the same numbers. Calling A the specimens with the pure active mark, L those with the latent mark, and H the hybrids, these proportions may be expressed as follows: 1A+2H+1L. This simple law for the constitution of the second generation of varietal hybrids with a single differentiating mark in their parents is called the law of Mendel.

Hugo de Vries - Species and Varieties, Their Origin by Mutation

It was of course impossible to measure the distance traversed during the invisibility of the Earth, but I reckoned that I had made above 500 miles between 1h. and 2h. A.M., and that at 4h. I was not less than 4800 miles from the surface. With this inference the indication of my barycrite substantially agreed.

Percy Greg - Across the Zodiac