From this type of chair down to the smallest possible seat, the gradation is gradual and constant. In certain types of work, like selling in a drygoods store, the space is sometimes so narrow that the only type of chair practicable, under present conditions, is the small folding seat that can slip under the shelves or fold up against them when the girl is serving a customer. Such also is the type of chair that folds up under or next to a machine, which the operator is tending, and which can be pulled out during the periods when the machines need no tending, and the operator is simply inspecting or waiting for the next tending period. Every one realizes the advantage, as a resting device, of anything upon which one can occasionally sit. The two-inch, iron arm of a seat on a railroad train, the tiny seat that folds into a walking stick or umbrella, that the enthusiast at the races takes with him,--these are typical examples of seats that seem almost ridiculous, yet that have an enormous effect upon the amount of fatigue accumulated in a few hours, or in a day. “A chair to rest in;” this is the second slogan. If a chair is not procurable, then some sort of a seat, even a packing box with no back, even a post to lean against, or a rail to lean upon,--anything to shift the pressure is better than nothing. Far better a seat with no back, immediately, than the best type of chair in the indefinite future. Get some sort of seat for the worker to-day, and begin planning for the efficient chair at the first day possible.