bloodline that simulated the wool characteristics of the 19th-century Navajo-Churro stock and would also supply adequate meat. The Fort Wingate researchers collected old Navajo-Churro stock from remote parts of the reservation and hired a weaver to test their experimental wool. Offspring of these experiments were distributed among the Navajo people. World War II interrupted the greater part of this effort when military work resumed at Fort Wingate. Coloration Prior to the mid-19th century, Navajo weaving coloration was mostly natural brown, white, and indigo. Indigo dye was obtained through trade and purchased in lumps. By the middle of the century, the palette had expanded to include red, black, green, yellow, and gray which signifies different aspects of the earth as defined by different locations of the reservation. Navajo used indigo to obtain shades from pale blue to near black and mixed it with indigenous yellow dyes such as the rabbit brush plant to obtain bright green effects. Red was the most difficult dye to obtain locally. Early Navajo textiles use cochineal, an extract from a Mesoamerican beetle, which often made a circuitous trade route through Spain and England on its way to the Navajo. Reds used in Navajo weaving tended to be raveled from imported textiles. The Navajo obtained black dye through piñon pitch and ashes. After railroad service began in the early 1880s, aniline dyes became available in bright shades of red, orange, green, purple, and yellow. Gaudy "eyedazzler" weaves dominated the final years of the 19th century. Navajo weaving aesthetics underwent rapid change as artisans experimented with the new palette and a new clientele entered the region whose tastes differed from earlier purchasers. During the later years of the 19th century, the Navajo continued to produce earlier styles for traditional customers while they adopted new techniques for a second market. Weaving Traditional Navajo weaving used upright looms with no moving parts. Support poles were traditionally constructed of wood; steel pipe is more common today. The artisan sits on the floor during weaving and wraps the finished portion of fabric underneath the loom as it grows. The average weaver takes anywhere from two months to many years to finish a single rug. The size greatly determines the amount of time spent weaving a rug. The ratio of weft to warp threads had a fine count before the Bosque Redondo internment and declined in the following decades, then rose somewhat to