were Edward Eyring and Caroline Romney. Their son, Henry the scientist, was born in Colonia Juarez. Grandfather Henry Eyring owned a store. His father, Edward Eyring was a prosperous rancher with several hundred head of cattle. From this point, when I use the names, Henry Eyring and Henry, I refer to the grandson, the scientist. 

Colonia Juarez is a small town that is located in the Mexican state of Chihuahua and is southwest of El Paso and southeast of the Arizona border crossings. Since most of the readers of this article probably do not know the location of Colonia Juarez, a map of this region of Mexico will appear as Fig. 1 in the forthcoming Bulletin article and that is also available from the author. Several Mormon settlements were established in the late nineteenth century. Only two remain, Colonia Dublan and Colonia Juarez. Colonia Dublan does not appear on the map as it is now a suburb of Nuevos Casas Grandes, which is a sizable city and easily found in the map. It is roughly in the center of the map, located on Mexico Highway 10. Colonia Juarez is a small town, in a narrow valley, southwest of Nuevos Casas Grandes, near the end of short secondary road that was, until recently, a gravel road. 

The main industry of the region is fruit orchards. Today, Colonia Dublan / Nuevos Casas Grandes is the economic center of the region because there is more flat land and a railroad. 

However, Colonia Juarez is the religious/cultural center of the Mormon community and looks like a typical small town in Utah. The bilingual school, Academia Juarez, that Henry attended will be seen in Fig. 2 of the forthcoming Bulletin , which is a photograph that I took in 2007 and which is also available from the author. It is seen in the foreground at the bottom of the hill in this photograph. The building on the right dates back to Henry’s time. 

The building on the left is more recent. Some of the houses of Colonia Juarez are barely visible in the background. 

Henry lived in Colonia Juarez until 1912. Because of the turmoil of the Mexican Rev- olution, life became dangerous. The Eyring family and most, if not all, of the Mormons were evacuated by rail to El Paso. The women and children were sent first and the men afterwards. Henry thought that he should be sent with the men and was disappointed that he was part of the first party. The expectation was that they would return soon. Some did but the Eyring family decided not to return. The family settled in Arizona in considerably reduced circumstances. The family thought that Henry was an American by birth. It was not until the 1930’s that he found that he was not. Thus, some of his most important and famous work was accomplished while he was a Mexican. It is reasonable to say that he is 

