. CASSIER's magazine . DASH-pots sont appliqués au type d'engrenage de Frickart, dans lequel le déclenchement est effectué par un excentrique séparé qui déclenchera la soupape sur la course de retour, ce que les engrenages de déclenchement ordinaires ne feront pas. Tous les moteurs modernes de la filature de coton sont équipés de mécanismes de déclenchement de sécurité qui ferment automatiquement une vanne d'arrêt lorsque le régulateur se rapproche de sa plus basse hauteur ou de sa position la plus haute, protégeant ainsi le moteur contre un emballement, et l'arrêtant s'il tourne trop lentement, alors qu'il serait favorable à un mauvais travail. Les moteurs illustrés en Fig. les cylindres 7 et 8 ont un diamètre de 36 pouces et 78 pouces

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. Cassier's magazine . dash-pots are applied to the Frickart typeof gear, in which the trip is actuatedby a separate eccentric which willtrip the valve on the return stroke, which ordinary trip gears will notdo. All modern cotton mill engineshave safety trip gears which auto-matically close a stop valve when thegovernor falls near to its lowest orrises near to its highest position, thusprotecting the engine from the dan-ger of a runaway, and stopping it if it runs too slowly, when it would pro-duce bad work. The engines illustrated in Figs. 7and 8 have cylinders 36 inches and78 inches diameter and a stroke of6 feet. They work with a boilerpressure of 180 pounds and their fulleconomical load is 3, 750 indicatedhorse-power with a 30 per cent, over-load margin. They have rope rimsof 30 feet grooved for 64 ropes ofi^4 diameter and the wheel weighs129 tons. The air pumps draw fromjet condensers and are of double-act-ing displacement type. The milldriven by these engines contains 103, -000 spindles and 2, 000 looms.. EFFICIENCY IN ITS RELATION TO THECONSUMER By H. F. Stimpson EFFICIENCY is the topic of theday. Few, however, compre-hend what its meaning is, whothe persons are whose capacity in thisrespect is susceptible of developmentor what its development means tothat most important person, the con-sumer. Efficiency, as a noun, is the relationbetween the action which has actuallyproduced a known result and the ac-tion which would have produced aresult which had been determinedupon in advance of the performanceof the action. It may be qualified byan accompanying adjective, as highor low, or expressed in the form of apercentage. In the current articles itis generally alluded to as being acharacteristic which is the peculiarproperty of manual or mechanicalworkers and which, as such, shouldbe developed by the direct contact ofcertain specialists with such workers.Not so. Efficiency is a characteristiccommon to every person, animal, ma-chine or substance capable of devel-oping or

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