Whereas we found that combing wool had to be left in the grease until it could be carded immediately after scouring, the maker of woolen yarn will buy wool that has been scoured months before. Most of the wool that is scoured by or near the growers finds its way into the woolen industry for this reason. The scouring given to clothing wool varies only in that it is more violent than that given to combing wool, and in that it is frequently augmented by carbonization to remove vegetable matter. [Illustration: _Mule Spinning_] [Sidenote: _Blending_] The first process after scouring is blending. When the desired mixture of various grades, kinds, and colors of wool, wool extract, or cotton has been effected, the resulting heterogeneous mass is put through the first of several carding processes. [Sidenote: _Fibres not parallel as in Worsted_] From now on the desire of the woolen yarn manufacturer is diametrically opposed to that of the worsted comber. He wants to open out the fibres, but he wants them to lie in all directions. He does not want uniformity. He wants just the opposite. His yarn must have a certain amount of strength, but it must have, first of all, felting properties, so that when the cloth is finished the various threads will merge and interlock. As might be expected, therefore, the carding process is very much more violent. [Sidenote: _Carding_] [Sidenote: _Condenser_] The blend is first put through a fearnought which might be described briefly as the most pitiless member of the card family. It is also known as a tenter-hook-willy, from the reversed position of its teeth. From this machine the wool goes through the card proper, which is similar to the worsted card except that the rollers go in opposite directions, instead of in the same directions. Here, again, the doffer lifts the wool off in a continuous filmy sheet and delivers it to the condenser. The sheet is not simply drawn through a funnel into a single thick sliver, but is forced between rollers into two leather rubbing aprons which by pressure and friction reduce it to a series of small soft flabby slivers, having just enough adhesiveness to permit of mule spinning. [Illustration: _Burling and mending_] The fibres in these slivers may be of all lengths and degrees of fineness, and they lie in all directions. There are now no elaborate drawing or combing processes. All that remains to be done before we have a weavable woolen yarn is a certain amount of twisting and attenuation. Both these results are obtained at once in the mule. [Sidenote: _Mule Spinning_]