American Society of Heating and Ventilating Engineers Guide, 1928 separating tank is generally used.

American Society of Heating and Ventilating Engineers Guide, 1928 Schools: Classrooms..... .................................. 2.0 cu. ft. per minute per square foot of floor area Assembly rooms............................. 1.5 cu. ft. per minute per square foot of floor area Gymnasia.... ....... 1.5 cu. ft. per minute per square foot of floor area Picture Machine Booth--...... ..... 1.5 cu. ft. per minute per square foot of floor area Dining-rooms--.......................... 1.5 cu. ft. per minute per square foot of floor area Kitchens.... ................... 2.0 cu. ft. per minute per square foot of floor area Corridors.......................................... 0.5 cu. ft. per minute per square foot of floor area Wardrobes and lockers................ 2.0 cu. ft. per minute per square foot of floor area Toilet, Bath, Etc.....'...................... 2.0 cu. ft. per minute per square foot of floor area Theatres: Seating spaces--.............. -............. 2.0 cu. ft. per minute per square foot of floor area Toilets, etc....................... 2.0 cu. ft. per minute per square foot of floor area Hotels: Assembly rooms....... ............ 2.0 cu. ft. per minute per square foot of floor area Dining-rooms.................................. 1.5 cu. ft. per minute per square foot of floor area Kitchens................................ :......... 4.0 cu. ft. per minute per square foot of floor area Hospitals: Wards--........................................... 1.0 cu. ft. per minute per square foot of floor area Dining-rooms.................................. 1.5 cu. ft. per minute per square foot of floor area Toilets........................ ..................... 2.0 cu. ft. per minute per square foot of floor area Kitchens-....... ........... 4.0 cu. ft. per minute per square foot of floor area Air temperature is second in the list for the reason that it has been proved by practically all of the accredited experimenters that over-heating is more detrimental to the quality of ventilation than any other one thing.

American Society of Heating and Ventilating Engineers Guide, 1929 Table 5.

American Society of Heating and Ventilating Engineers Guide, 1929 On new jobs it is advisable wherever possible to drain condensation directly to sewer during first week of operation, thereby preventing pass age of grease and dirt to the boiler from the system.

American Society of Heating and Ventilating Engineers Guide, 1929 blow air through heaters rather than to draw through by suction and most fan furnaces are designed for this arrangement.

American Society of Heating and Ventilating Engineers Guide, 1929 Page D. & T.

American Society of Heating and Ventilating Engineers Guide, 1929 1902 President_____ _________ _ 1st Vice-Presidents _A.

American Society / Heating and Ventilating Engineers Guide, jgjjM will give an effective temperature of 75.7 deg.

T a b l e 1.

Air Conditioning and Heating Piping Tubin* Chicago Metal Hose Corporation Maywood, Illinois District Offices Atlanta Boston Chicago Cleveland Detroit Ft.

-77- dusts of the following size characteristics: 99 per cent smaller than 2. 80 microns 95 n 90 ii ti it nn " . 1. 80 " " 1.40 " 60 it ii ii " 1.00 " 70 n ti ii " C. 85 " 60 ti ti it " 0.72 " 50 n n ii " 0.60 " It will be noted that 80 per cent of the dus~ used in these approval tests is below one micron (l/25,000th of an inch) and 50 per cent is below 0.6 microns.

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> l cc accompanied the materials referred to in c) and the dates these first appeared.

Exhibit 3 JPATTOfsTAt -v.kunmeNTAL health Montreal, Canada Mortality in the Chrysotile Asbestos Mines and Mills of Quebec ].

Heating Systems specialties Armstrong Machine Works 851 Maple Street, Three Rivers, Mich.