Letters.

This document is a collection of letters to the editors of American Scientist. The first letter discusses the contrasting approaches to science presented in two articles, one emphasizing evidence and the other highlighting visualization and artistic creativity. The second letter shares the author's personal experiences with observing nebular structures and collaborating with other astronomers. The third letter expresses appreciation for an article on J. Willard Gibbs and shares an anecdote about him. The document also includes information on how to write to American Scientist. [Extracted from the article]