Our three and three and a half feet mills are often found grinding faster than the four feet sizes of the old style of mills, at the same time doing as good and better work. These are facts, and the reasons why are simply because the stones are run at a greater speed, while the furrows are shaped to avoid heating, and properly drafted to distribute the grain evenly over the grinding surfaces. Also, much is owing to a good selection of the burr stock of which the stones are made. We conclude this subject by reference to some who have given us their views, carefully expressed in writing, and here published for the benefit of all those interested in milling. Keeping in Order. The face of the bed stone must be kept level and the spindle in perfect tram with it. To tram, take off the hoop and runner stone, and if a _Pulley Mill_, put on the belt the same as when grinding; then place on the spindle a wooden arm with a hole in one end to fit tight on the upper end of spindle, so that it will traverse the face of the bed stone, having before made a small hole through the projecting end to receive a quill or piece of whale-bone to trace the surface of the bed-stone about two inches in from its skirt. On turning the spindle, it can now be readily seen which way the step is to be moved in order to throw the spindle in tram; if it is properly in tram, the quill will traverse the bed-stone evenly around its face. To tram our _geared mills_, the toe of the spindle must _not be moved out of line_ with the shaft holding the driving gear wheel; the proper way is to tram it in the bush, which is provided with suitable keys. However, when the toe of the spindle or step is required to be moved length-ways of this shaft, no bad results will follow, provided the cogs are all the time in proper depth--even on their back or large end, and not too deep in gear. The spindles of our mills are not apt to get out of tram, but in all mills they should be closely watched and frequently tried in this particular. When the _spindle is in perfect tram_, and the _runner in balance_, the _burrs will not wear out of face_, but the reverse, they will naturally _wear in face_. The followers should not be forced too hard against the spindle by the wedges in the iron bush, as it will make the spindle heat. The space under the leather, on top of the bush, should be well supplied with tallow rolled up in a woolen cloth and laid immediately around the spindle. The oil cup in the bush should be supplied with good sperm or lard oil every time the burrs are taken up. Place some candle-wick in this cup, with one end against (_not around_) the spindle. This keeps the spindle supplied with a continual flow of oil in addition to the tallow. Oil the spindle step with good sperm or lard oil, clean out once a month, and keep out dirt.