. Dr. Evans' How to keep well; . Dept. of Public Instruction, Springfield, III. Fig. 517.—Heater with Jacket Not Reaching the Floor. This cut illustrates how thedoor controlling the supply of air to the furnace should be placed to take in the airfrom the outside, from within the room or from both. When the door is open it closes theoutside opening and opens that from the inside. The air is then all taken from the the door is closed the air is all taken from the outside. When the door is part wayopen, the air comes from both outside and inside. 1269 1270 HOSPITALS—SCHOOLS You are evid
. Dr. Evans' How to keep well; . Dept. of Public Instruction, Springfield, III. Fig. 517.—Heater with Jacket Not Reaching the Floor. This cut illustrates how thedoor controlling the supply of air to the furnace should be placed to take in the airfrom the outside, from within the room or from both. When the door is open it closes theoutside opening and opens that from the inside. The air is then all taken from the the door is closed the air is all taken from the outside. When the door is part wayopen, the air comes from both outside and inside. 1269 1270 HOSPITALS—SCHOOLS You are evidently not in good physical condition and are justified ingoing to some trouble to get things bettered. We assume that you areanxious to teach in this climate. If you can get exchanged to an open-airschool do so. If that is impossible try for a cold-room school. If you must remain where you are proceed as follows: Buy a depend-able thermometer. Buy a wet and dry bulb humidity measurer—a hy-grometer. Keep an hourly record of
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