176 LjO RENEWAL PARTS Contact Kits and Magnet Coils Li- CC u 3 WHEN ORDERING SPECIFY Contact kit or coil number p_QLL0UU____ 1 y 000 0*50 "a0 t/300 CE Q_<0 O _l 1-- C_3 Q 0 1-- < x Ow-4 ..

440 Tut-ntx-sctoad Congress--National Safety Council The opening nnica as called to order by Chairman Charles E.

350 Twenty-third Annual Safety Cunyress--National Safety Council The Dust Hazards in Industry By DR.

PLAINTIFF'S EXHIBIT r .....

144 Am.

F ig . 17.

American Society of Heating and Ventilating Engineers Guide, 1925-26 Gravity hot water heating systems may be.designed for even circula-. tion at any range of water temperature difference between flow and return, within practical limits.

American Society of Heating and Ventilating Engineers Guide, 1925-26 quantity of water is the pressure necessary to overcome friction in the pipes (when horizontal) plus the static pressure when the discharge is higher than the supply.

American Society of Heating and Ventilating Engineers Guide, 1926-27 Long runs of pipe are used and expansion and contraction require more consideration than in house heating work; piping must be tied up, anchored, installations must be flexible; expansion joints are no more desirable in greenhouse heating than elsewhere; expansion must be com pensated for by "spring" of pipe and by swivel fitted joints, and expansion joints used where expansion may not be compensated otherwise.

American Society of Heating and Ventilating Engineers Guide, 1926-27 periods when the space is only partly occupied and the mechanical arrangements are inadequate for properly varying the quantity of air handled to suit.

American Society of Heating and Ventilating Engineers Guide, 1926-27 0 deg. cent, and 760 m.m.

American Society of Heating and Ventilating Engineers Guide * 1928 Containing Design and Specification Data Useful in the .Planning and Construction of Modern Heating AND VENTILATINC INSTALLATIONS-----PREPARED FROM THE Society's Transactions--Investigations of Its Research Laboratory -- and the Practice of Its Members together with a Manufacturers' Catalog Data Section Containing Essen tial and Reliable Facts Concerning Modern Equipment AND A Consulting Service Section for Engineers also The Roll of Membership of the Society with Complete Index of Technical and Cataloc Data Vol. 6 $4.00 Per Volume 9S5740 Published Annually by American Society of Heating and Ventilating Engineers 29 West 39TH Street New York

American Society, of Heating and Ventilating Engineers Guide, 1928 Table 7-B.

C.

American Society of Heating and Ventilating Engineers Guide, 1928 QILLHAM, Walter E.,* (1917), (Treas. 1926; Council 1924-1926), Consulting Engr., (for mail), 409 Interstate Bldg., and 3427 Bellefontaine, Kansas City, Mo.