' 37.

PLAINTIFF'S EXHIBIT Industrial Hygiene Third Printing, June, 1925 3' r* zi cn W CH z 5> 5O0 o5>8< St*5 rQo H> K 2Z ns _ >z 5E -< w *--rw'V'JL-..

16 Am.

AMFRIfflN SOCIETYOF BEATING & YENTILAIIN6ENGINEERS 6DIBEJ923 by lining ordinary galvanized-iron pipe with 1 in. of a patented, porous insulating material that will not disintergrate in water and withstands a temperature of 500 deg. fahr. or more.

AMERICAN SOCIETYOF SEATING & VENTILATING ENGINEERSGMDIB23 3.

Radiators and Hangers Fowler & Wolfe Mfg.

American Society of Heating and Ventilating Engineers Guide, 1924-25 large ranges a properly designed hot-water plant and a properly designed steam system would be equally economical, but the first cost of hot water is very much above the first cost of steam.

Roll of Membership RYAN, Henry B. (1920), Vice-Pres..

LIST OF MEMBERS Arranged Geographically ALABAMA Birmingham-- Bunnell, E.

American Society of Heating and Ventilating Engineers Guide, 1925-26 These conversion factors m u ltip lie d b y the heat loss from any ra d ia to r, operating under the indicated conditions, give th e heat lpss b y the same ra d ia to r o p e ra tin g a t 215 deg. fa h r. in a room a t 70 deg. fahr.

Roll of Membership * KING, Thomson (1923).

Roll of Membership VOGELBACH.

American Society of Heating and Ventilating Engineers Guide, 1926-27 properties of the covering.

American Society of Heating and Ventilating Engineers Guide, 1926-27 Answer.

American Society of Heating and Ventilating Engineers Guide, 1928 A grade, or pitch, of %th of an inch in 10 ft. is ample in either case.