American Society of Heating and Ventilating Engineers Guide, 1928 Chapter XI--Gravity Warm-Air Furnace Heating STANDARD CODE REGULATING THE INSTALLATION OF GRAVITY WARM AIR FURNACES IN RESIDENCES* FOURTH EDITION May 1, 1927 This Code is approved and issued by authority of the National Warm Air Heeling 6* Ventilating Association, The American Society of Heating & Ventilating Engineers.

American Society of Heating and Ventilating Engineers Guide, 1928 < that the dampers will always be held shut by springs or weights when no air is permitted to pass or when the air compressor is shut down.

American Society of Heating and Ventilating Engineers Guide, 1928 per unit of time; together with a consideration of such odoriferous operations as may exist in the ventilated spaces, and the purity of the source of air supply.

American Society of Heating and Ventilating Engineers Guide, 1929 Circulation is accelerated if the drop to the furnace is through a round inclined pipe with, say, two 45-deg. elbows rather than through a vertical drop and two 90 deg. elbows.

American Society of Heating and Ventilating Engineers Guide, 1929 212 F ig . 3.

American Society of Heating and Ventilating Engineers Guide, 1929 One heat equipment in this way takes the place of two.

American Society of Heating and Ventilating Engineers Guide, 1929 it is filling.

American Society of Heating and Ventilating Engineers Guide, 1929 MILLER.

Insulation, Building and Sound Deadening International Fibre Board Limited TE IT: Insulating Building Board Non-Inflammable Insulating Building Board Sales Offices OTTAWA--MONTREAL--TORONTO--WINNIPEG Administrative Offices and Mills: GATINEAU.

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CURRICULUM VITAE NAME: DATE OF BIRTH: PLACE OF BIRTH: CITIZENSHIP: EDUCATION: Hilton Cecil Lewinsohn 7th November, 1928 Wolmaransstad, South Africa British , -KSntIffs I EXHIBIT I1 UC-1275 Wolmaransstad Primary School Jeppe High School for Boys, Johannesburg, South Africa University of the Witwatersrand Medical School QUALIFICATIONS: - M.