To-day, when the utmost ounce of energy is needed from man and woman, and boy and girl, wherever munitions production is concerned, it is recognized that the quality and quantity of the workers' food matters, and that even the surroundings where the meal is partaken of counts in the conservation of the essential reserve of human energy and power of will. Thus, the best type of industrial canteen is designed not only 'to feed the brute', but to rest his mind. This is especially the case in certain Filling Factories, where immunity from ill-effects from the handling of T.N.T. has been found to depend largely on the physical fitness of the workers. In such factories, as well as in establishments where women are employed on night shifts, the provision of canteens is obligatory on employers and, indeed, recent legislation (the Police, Factories, &c. (Miscellaneous Provisions) Act, 1916) has empowered the Home Secretary to require the occupiers of workshops and factories to make arrangements, where necessary, for the supply of meals for their employees. In the stress of warfare, when the demand for a maximum output is necessarily the pre-occupation of the factory manager, it was, however, recognized that the canteen must be State-aided. A Canteen Committee was therefore appointed under the Central Control Board (Liquor Traffic). The work of this committee is twofold: it aids the factory management to open its own canteen or canteens, and it supervises and helps approved dining-rooms managed by voluntary bodies. In the first case, the expense for any necessary canteen is entirely borne by the Government, if the factory is a 'National' one. In Controlled Establishments, the employer is allowed to charge the cost of the canteen as 'a trade expense', a concession by which the State practically bears the expense out of funds which would otherwise reach the Exchequer. In the case of canteens provided by voluntary bodies, such as the Young Men's Christian Association, the Young Women's Christian Association, the Church Army, the Salvation Army, the National People's Palace Association, Ltd., &c., the Board pays half the capital expenditure, where approved.[3] [Illustration: BALSMING LENSES] [Illustration: MAKING INSTRUMENT SCALES]