In geared mills, pay particular attention to the adjustment of the gear wheels. If they are _too deep or not deep enough_ in gear, they will not run so smoothly and will cut out. As the wooden cogs wear, in time a shoulder will be formed on them by the iron cogs in the pinion. In order to obviate the tremble or rough running that this shoulder would cause, it should be trimmed off from time to time. Grease the cogs with tallow, and see observations on keeping stones in order, under head of “Setting up and Starting.” WE REQUEST as a favor of any of those using our machinery, mills, bolts, &c., to inform us if they are not working satisfactorily; in such a case, state plainly as you can in what particular, as we will take pleasure in correcting the defect or giving advice concerning it. Some of our mills and mill stones that have been used constantly for 8 to 12 years may require some changes, such as re-setting the irons, improving the dress, &c., that would make them as good as new; when written to or interviewed on the subject, will state to the best of our ability what should be done. In Ordering, or when a Correct estimate of Cost is Wanted, It will be quite a help both to our customers and to ourselves to observe the points mentioned below. A plain statement of the situation and what is wanted, together with a rough sketch will often save much delay and trouble. 1st. Give location of Mill, _i. e._, its relation to road, railway, and power; where it is most convenient to receive grist work and where merchant grain. 2d. State size of mill house; height of stories from floor to floor; pitch of roof, and which way comb of house runs; which way the joist and timbers of the mill run, and their size. 3d. If there is a basement under the grinding floor, and how high. 4th. If water power is to be used, state size and kind of water wheel and its speed. If a turbine wheel, give height of head, which way wheel runs, and location of mill-house. 5th. If the power has not been improved, state the fall that can be obtained, and give the amount of water in depth and width running over a weir. See “Measurement of Water in a Stream.” 6th. If the power used is steam, give the diameter of cylinder and length of stroke of engine; number of revolutions per minute made by engine; diameter and width of face of band wheel on engine; which way the engine runs--whether top of band wheel runs to or from the mills. 7th. Make a sketch showing the location of engine bed plate and shaft to the mills. 8th. State whether the mills are wanted to run with or against the sun. We build them to run with the sun unless otherwise ordered. 9th. Name the place to which the machinery is to be shipped and, if thought best, by what route. It often happens that we can judge best the way to ship. Also, your name and post office plainly and in full.