Se estudió la variación dentro de toda el área del cuero para capellada de las siguientes propiedades: distensión (mm) y carga (Kg) de la rotura de la flor y de estallido del cuero. Para cada propiedad se indican los estimadores de la media aritmética y del coeficiente de variación porcentual dentro de los cueros y entre bloques correspondientes de diferentes cueros. El análisis de varianza revela que el mayor componente de la variación total lo constituye la variación entre cueros. Los estimadores de la varianza entre ensayos adyacentes dentro de cada bloque, muestran que la misma no es homogénea en toda el área del cuero.

A study was made on the variability over the whole side and between sides for the following properties: distension (mm) and load (Kg) at both grain crack and burst of leather. Eleven chrome retanned upper leathers were divided into 21 blocks arranged in 3 raws and 7 columns. One test was performed on each block. The analysis of varianza showed that the variation between sides is greater than that within sides. Furthermore, on three sides, as many tests were performed their sizes allowed it. From this data averages and S. D. (error) were estimated for each block and for each side. In the latter case the values were similar to those above mentioned.