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Mr. F. M. MESSENGER. I don't think the blower system is as expensive as some others. A proposition was made to our company for moistening the air by the blower system, and I think that system was a little less than half the expense of the aerophor.

Mr. W. J. KENT. It may seem strange to the members of the Association who have heard the paper read by a manufacturer of New Bedford where the air is always just right; but, notwithstanding the fact, the three things which Mr. KERR presents have to be combined in New Bedford to manufacture cotton cloth successfully. I have yet to see an apparatus which will give us these results, and I hope that some one working in that direction will produce something before long to that end; as I shall be in the market.

Mr. C. J. H. WOODBURY. In the matter of school-house ventilation, we have put into some of the school-houses of Lynn, where I happen to be a chairman of the school committee, a method of forced ventilation, by which the air comes from the outside, and is heated by steam coils at the base of flues running to each room. There is a mixing damper at the base of each flue, controlled by a chain in the school-room, and the teacher can in that way entirely regulate the heat of the school-room by pulling this chain from one position to another, and altering the ratio of incoming air from the temperature of that passing among the steam pipes to that of the outside temperature, but the volume of air circulating through the school-room, at the rate of 125,000 cubic feet per hour, cannot be changed.

In this arrangement there is a provision for moistening the air by arrangements for injecting a small amount of steam at the bottom of the ventilating flues. It seems to me that it is far easier to add water to the atmosphere than to dry it. I don't think I have seen any methods attempted for removing water from the air in damp weather, though I have often

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thought that, in connection with the blower system of ventilation, it might be possible to dry the air by means of lime, if the change would be worth the cost of doing it. There are various kinds of apparatus for removing moisture thrown out in dry rooms, by means of a coil of pipes with a solution of brine passing through them, cooled by volatilization of liquefied ammonia or some other refrigerating method, and the condensation is carried away in the form of water.

Mr. ROBERT R. Smith. In the Greenwoods Company's mill in Connecticut we have had considerable experience in moistening the air to counteract the effects of electricity. It seems sometimes as if about all the electricity in New England came over the hill on the north-west of our mill, and for time would stop the work entirely. We have tried many devices for this purpose, - steam, with hose, dampening pot, etc. The first apparatus used was made by Mr. GARLAND of Biddeford. I think we have had it in our brick mill for ten or twelve years, and I can speak very favorably indeed of it. It has enabled us to do our work a great many mornings in winter time, when we should have suffered great loss in product without it or some similar device. The next apparatus we had was the aerophor system, which was put into our old frame mill, and in order to get a circulation of the moist air, small fans driven by power were placed in the bottom of the aerophors, forcing the air out and through different channels left open in the apparatus for the purpose. These worked very well, but there was considerable trouble in getting at, and taking apart, the rose heads and taking out sponges and springs. It was considerable trouble to keep them clean; also the fans, which ran rapidly, became worn in their bearings. We adopted afterwards a different apparatus of the same manufacturer, the Aerophor Company that has spreading wings; and which you have seen illu trated in the “ Journal of Commerce” and other par devoted to textile fabrics. Our men about the prei

were at a loss what name to apply to them ; but finally called them “angels' wings.” These angels' wings were taken to the upper story of our mill, which is much higher than the others, and they disseminate moisture; making the work go easier, the hands happier and the air cooler. This apparatus has worked very satisfactorily. For the lower stories we adopted a different process, and put in this apparatus which I have here, which was introduced by Mr. WALLACE, and perhaps he will speak for it himself.

Mr. WALLACE. I should like to have you describe it.

(A section of two Atomizers, in the room, was first put into operation and used in illustration.)

Mr. Smith. Mr. WALLACE's design is to run the supply pipe from the town or city pressure, or from a pump. We put in a horizontal pump. This pipe (indicating on the Atomizer) runs through and supplies these heads here, which you can locate to suit the height of your mill. This chain is hitched

. at the end of the mill, and you can open the valves and give more or less moisture, as you choose. We first used the chain ; but some of these orifices in the valve would get stopped up more than others, and they would discharge their moisture unequally; and then, owing to the draft of air in the room, the moisture would condense and come down on the floor and on the machinery; and so we have discarded the chain. Most of our weavers keep a stick by the side of their looms for measuring the width of the cloth ; and with that stick they reach up and close or open these valves as necessity requires; and so each weaver at a set of looms can regulate the moisture to suit himself or herself, as the case may be. I have taken pains to observe how nearly these employees, who are simply weavers, would regulate the moisture for their work. Hardly ever do I pass through the mill and find these valves shut off entirely. Sometimes

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THIS Valve is substantially made of non-corrosive gun metal, and is worked

by ordinary water pressure alone, and may be screwed to a T or 3-8 opening in a water pipe anywhere. A 3-4 inch water pipe may run the length of a room, over an aisle, with T's reduced to 3-8, placed where vapor heads — valves

are needed. a, a. Automatic valves of non-corrosive bronze, 10 to 20 feet apart. B, B. 3-4 inch galvanized iron cold water supply pipe. C, C. 1-2 inch plain iron return pipe and fixtures. E, E, E. A steel safety chain attached to the arms which rock the valves, and passes over pulleys at either end of the line, being weighted at the right and hooked at the left. Unhook it, and let the weight slightly turn all of the valves, and it increase the flow of the vapor. The reverse motion diminishes it, thus meeting quirements of atmospheric changes. 2, 2. Bessemer steel arms and joint Tulate the valves. G. End of room.

The fitting of a room is plain piper's work. The water and are connected and pitch 1 inch in 20 feet to the left that the discharged.

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