Alfonsina Storni (1892-1938) was a seminal Argentinean author who had a deep influence both on her readers and other writers. Best-know for her poetic works, she also wrote poetry, theater, and works in prose. The purpose of this dissertation is to discuss her prose works, heretofore classified as articles, notes or essays, under the literary genre of chronicles, and analyze Storni's style in these works, which is best described as literary impressionism. The corpus studied in comprised of 35 brief chronicles published in the magazine La Nota and some 30 more published in the Argentine newspaper La Nación from 1919-1937. These two groups form the majority of Storni's chronicles. I also consider some chronicles which appeared in magazines such as Fray Mocho, Atlántida and Hebe. I addition I discuss two of her lectures, "Desovillando la raíz porteña" and "Entre un par de maletas a medio abrir y las manecillas de un reloj". Some of the important themes or these works are women in the labor market, the place of women in modern society, and literary creation. The first chapter is dedicated to the definition of "chronicle" and "literary impressionism." The second chapter surveys the critical literature on Storni in order to determine why her prose works have not previously been studied, and the third, fourth, and fifth analyze her chronicles and present an account or the historical circumstances in which they were produced. All of her chronicles, some 80 in total, are written in an impressionist style and maintain a coherence of form and consistency in the themes they address. Careful analysis of these chronicles leads to the conclusion that Storni's chronicles are an integral part of her literary opus, and that Storni was one or the most important literary creators in the history of Argentina, an original feminist and a painter of the modern life.