Cold iron trellis grips the vine

The iron trellis in the south corner of the St. Thomas monastery garden feels cold against the palm this morning, April 14th, 1863. A single Pisum sativum vine has reached the third wire, its tendrils curling with a grip that defies the late frost. The question of why some seeds result in tall plants and others in dwarf ones appears, at first glance, to be a matter of simple observation. One might assume the answer lies in the soil, the sun, or the quality of the water provided by the monks. However, the answer to “how tall will it grow?” is easily obtained by waiting until harvest and applying a measuring stick. The answer is a measurement; the question is a void.

Finding the correct inquiry required ignoring the individual height of this one vine. The difficulty lay in moving past the visible plant to the invisible law. If one asks why this specific seed produced a tall stem, the answer is lost in the particulars of the weather and the earth. If one asks what the ratio of tall to dwarf will be in a population of one thousand and sixty-four plants, the structure of nature begins to reveal itself. The answer is 3.06 to 1. This is a good answer. It is precise. It is verifiable. Yet it remained hidden for centuries because the preceding question was phrased incorrectly.

Observers previously asked how traits blend together. They looked for the middle ground between the long and the short. The correct question required the assumption of discrete, unchanging units that do not blend but instead sort themselves. Finding that question took seven years of planting, labeling, and counting twenty-eight thousand plants. A good answer can be calculated in an afternoon once the data is gathered. A good question requires one to stand in the garden for a decade, refusing to accept the obvious evidence of the eyes until the math of the population overrides the appearance of the individual. The seeds for next year are already sorted into their respective jars. I have decided to increase the sample size for the flower color trials to ensure the ratio remains stable at n=500.