Shoemaker's or Tailor's trades, to the number of about 90. The work hours are from 1 to 4:30 o'clock P. M., except on Saturday. The girls are taught household work, plain sewing and dressmaking, and to a limited extent, fancy sewing. Four of the girls are learning the Tailors' trade.

The Superintendent reports the Deaf Mute Asylum full, and that the managers will ask for $25,000 to complete the foundation of the centre building.

The complaint referred to this Board for investigation against this Institute, and our action thereon, will be understood from the special report to the Governor, of September 24th, 1874.

THE REFORM SCHOOL AT ST. PAUL.

There are now in this school, boys 110, girls 3; total 113. The furnaces in use in the old building at the last inspection have been abandoned, and it is now heated by steam, and direct radiation. The steam pipes extend around the walls of the rooms at the floor, and in addition there are three stacks of pipes in the basement. Cold air is introduced from the outside to each of them, heated and thrown into the building. Though an improvement, this work is not well done, nor is it sufficient. The foul air registers are not large enough, nor is proper attention paid to their management. The committee gave instructions as to their use. This steam apparatus was put in by Wilson & Rogers, of St. Paul. The new building, containing school rooms and dormitory, and the detached building, also new, used for work shops, are heated by another steam apparatus, put in by Woolsey & Co., St. Paul.

All the rooms in these buildings are heated by radiating stacks, without any attempt to introduce fresh air. The foul air ducts are not sufficient, and without air supply cannot work well. All the evils of the old capitol heating apparatus are here reproduced in a way positively reprehensible.

The plumbing in the old building is as at last report, and in fact, since it was introduced, useless. No attempt is made to use it.

The drainage is, as at last report, into a sink 40 feet to the rear of the building, which overflows into another 20 feet nearer the barns, and further away from the house. Both are well closed and trapped. The privy is near the barns, and in the same filthy condition as at last report.

The water supply during the last summer has been from a drive well 35 feet deep, near the barn and 60 feet from nearest sink. No marked sickness occurred till August 29th, when a boy came down with typhoid fever. Other cases followed during September, till at date there have been 22 cases and three deaths. A sample of the water from the well above referred to was examined by the Secretary of the Board, and found contaminated with sewerage. The use of the water was stopped, and the older well, 500 feet east of the buildings and 60 feet deep, was again used. That water has also been examined. The following memorandum of the analysis will explain:

Well 35 ft. deep-near barn.

Solid residue to the gallon, 50 grs.

Well 60 feet deep.

17 grains.

The

There is scarce a doubt that the water in use when the fever broke out contained a considerable amount of organic matter, sufficient to render it entirely unfit for use. water of the deeper well, judged by the sample examined, is a fair water, sufficiently pure for drinking and domestic use. But one case of fever remains, who is convalescent. The health of the pupils is at present good.

The general condition of kitchen, school-rooms and dormitories is fair.

INSPECTION OF THE NEW HEATING AND VENTILATING APPARATUS OF THE CAPITOL BUILDING.

Conditions of the Problem.-Each chamber contains 51,000 cubic feet of air. Each is required to have a temperature of 65° to 70°, F.

The population of the Senate chamber is 41 senators, 12 pages and clerks, and an average of 40 visitors. Total 93 persons.

Allowing 3000 cubic feet of fresh warmed sir per hour per head, there is necessary for the ventilation of the Senate chamber during the day, 279,000 cubic feet of air per hour. At night there are 27 gas burners in operation. Each burner requires as much air as three men, 27x3-81 men, requiring 243,000 cubic feet of air per hour.

Required for night ventilation of Senate chamber, 279,000, -1-243,000-522,000 cubic feet air per hour.

Population of the House chamber-104 members, 12 clerks and pages-and average of 40 visitors=158 persons, and allowing 3000 cubic feet of air per head per hour, their is necessary to ventilate that chamber during the day, 474,000 cubic feet air per hour.

The demand for gas burners of Senate, 243,000 cubic feet air per hour.

The night ventilation of House chamber, 717,000 cubic feet air per hour.

This is the amount of air which the foul air ducts should extract from each of these chambers per hour, when the Legislature is in session, to keep the amount of carbonic acid in the air at the standard of 6 parts in 10,000, the external air being 4 parts in 10,000.

THE METHOD IN USE TO ACCOMPLISH THIS RESULT.

Warming by steam. Direct radiation from pipes around the walls of the rooms, next the floor, from upright coils in the ventilating shafts and by two coils under each chamber.

Through these last, cold air is brought from outside the

building, warmed and thrown into each room, through registers in the floor between the doors and speaker's desk in centre aisle.

The foul air ducts are perpendicular shafts extending from floor to ceiling, against the front and rear walls of the building, inside the chamber, two on each side. They are lined with tin, and above the ceiling makes an oblique angle and enter a five foot Emerson's Ejector in the roof, over the centre of each chamber. Each of these shafts has two registers, one at the floor and the other at the ceiling. They have the same superficial area as the interior of the shaft, 4.3 sq. feet each. In the centre of the ceiling, and opening into the base of the ejector, is a register five feet in diameter in which is a single valve turning on its centre. The two chandeliers, twelve lights each, are over the central aisle and about ten feet on either side of this register. The superficial area of the heat registers in the floor equals that of the foul air ducts.

At the date of inspection, 11 A. M., December 12th, 1874, the temperature of the outside air was 26° F., and a brisk breeze was blowing. The boilers carried 20 lbs. of steam and the House chamber only was warmed. The temperature of the air at the heat registers varied. The one nearest the doors and farthest from the cold air entrance, was 75 to 85° F. That nearest the speaker's desk was 58° to 70° F. The temperature on speaker's desk was 67° F .; on railing of the gallery, 70° F.; and at an elevation of five feet in centre of the room, 70° F.

Closing all doors and windows, the center register and the upper registers of foul air ducts, we found the rear wall ducts delivering each 72,240 cubic feet per hour, or together, 144,480 cubic feet per hour. Those in the front wall 70,176 cubic feet, or together 140,355 cubic feet per hour. Total discharge of foul air 284,832 cubic feet of air per hour, =1,802 cubic feet per hour per head during the day; 1,191 cubic feet per hour per head during the evening, including the gas lights. Opening the registers at the top of the ducts, diminished the discharge through lower registers nearly

one-half, and closing them and opening the central register had the same effect. The influence of the heat of the gas lights in increasing the discharge of foul air we could not estimate, but it can hardly be enough to carry off the foul air they produce.

The heating apparatus in Senate chamber was not in operation, so that the only causes at work to produce ventilation were the natural ones-diffusion of gases and the force of the wind on the ejector in the roof. We examined the circulation in the foul air ducts, all doors, windows closed, and all registers including those for heat shut, except those at the base of foul air ducts. We found the air going into them as follows: The two next rear wall each 61,920, or together 123,840 cubic feet per hour. Those next front wall each 55,728, or together 111,456 cubic feet per hour. Total 235,296 cubic feet per hour, being equal to a supply of 2,530 cubic feet per head per hour during the day, and 1,352 cubic feet per head per hour during the night including gas lights.

This circulation caused by natural means, with a difference (26° F. 56° F.) of 30° between inside and outside, and by the force of the wind on the ejector. If the heating and ventilating apparatus works in the Senate chamber as in the House chamber, it will furnish during the day at least 3,000 cubic feet per head per hour. At night (including gas lights) 1,637 cubic feet per head per hour. The air in the House chamber had the peculiar odor of steam heat, and felt dry. We did not test the degree of moisture, but we feel safe in suggesting that evaporating pans be put over each coil in the basement, and that the quantity of water be regulated by automatic machinery so that there can be no mistake in the constant supply. It is evident that the contamination of air by gas lights is so great in these chambers that the problem of ventilation would have been much simplified had the air from these lights been provided with a separate escape. That might have been done for each chandelier and the present ceiling register been rendered unnecessary. The metalic tubes from the chandeliers car