Step 1: Understand the flour pellet method.
This is a simple, effective field technique to measure the size of raindrops. It involves exposing a container of fine, dry flour to the rain for a brief period. The raindrops form small dough pellets upon contact with the flour. These pellets are then dried and sieved, and their weight is related back to the original drop size through calibration charts.
Step 2: Identify the scientist associated with the method.
Norman Hudson, a prominent soil conservation researcher, is widely credited with developing and popularizing this method for use in soil erosion studies. The other names listed are associated with other areas of hydrology and engineering (e.g., Ramser with drainage, Snyder with synthetic unit hydrographs, Dicken with a runoff formula).