1. Because we desired to get standard data at the same time comparable with our other standard data. We might also use it for checking, by means of motions in another trade, the underlying laws of motions, which we had already deduced in several other trades. 2. Because we desired to have the motions in very nearly the same places every time, in order to get the extra efficiency and the lesser fatigue that come from the habit that is formed in this reaching and grasping. Many of these laws have since been re-checked and used in methods of least waste for the transference of skill from one trade to another. Habits have been formed that permit a much greater amount of output with less fatigue. This latticed packet gives us the same dimensions as our cross-sectioned background. We use four inches in our American work, and ten centimetres in our European work for these distances--the difference between ten centimetres and four inches being almost exactly one-sixteenth of an inch, or so small a difference as to be practically negligible in work on motion study. This cross-sectioned packet has, therefore, not only many mechanical benefits, such as forming supports, either horizontally or vertically for hangers, but it is also cheap to build, light in weight, and forms an excellent, relative scale for measurement and for “recording the surrounding conditions” of a case of micromotion study. In fatigue study, as in all other work of investigation, it is difficult to obtain assistants who can “observe what they can see.” Of those observers who observe what they can see, few will write down what they observe. Of those rare ones who can observe and will always write down, few have the habit of maintaining the standard conditions in a long series of observations. We therefore cross-section the background, make our devices, when possible, multiples of four inches, and record the conditions by means of photography, that gives us the key to causes of deviation from class results. The modification of the table consisted of making it of such a design that it could be turned over on its side to form a low table for tall or double-deck braiders, that would permit motions of less fatigue. [Illustration: FIGS. 27 and 28 This picture shows the arrangement of parts for the base group of the braider. It will be noticed that there are three adjustable shelves, two vertical and one horizontal, for the support in a more convenient position of certain parts that have to be picked up, for least fatigue, by handfuls at a time. The various kinds of shelves, clamps, and tables for different sizes or kinds of machines can be removed or attached to the packet with one motion of the hand.