* Bound hrook Boston Chicago Cleveland (Healty & Personal) Balias Detroit ShitO Lead Work* Houston Minneapolis Basrark.

Equipment is available which provides two temperature.adjustments to each instrument, such that if the general air pressure leading, from the central compressor to the thermostat is suddenly changed, the service is switched automatically from one control to the other, and if the pressure again shall be suddenly changed, the service will be switched back.

Underdrains leading to points of free discharge are placed in the gravel or crushed rock beds. 109

Conduits are placed on a bed of crushed rock or gravel, approxi mately 6 in. deep, and this is extended upward to about the center line of the conduit when trench is backfilled- Underdrains leading to points of free discharge are placed in the gravel or crushed rock beds.

Sold by leading metal merchants.

The Automatic Burner Corporation are leading manufacturers of the rotary, inthe-ashpit type of oil burner.

Weather Bureau reports are frequently mis leading in this respect as they report the maximum temperature for the' day with the relative humidity which occurs during a different period and which usually is much higher than the relative humidity occurring at the maximum temperature.

The access of fresh air to the ventilated room to take the place of the exhausted air must be given consideration in determining the capacity to be expected: If the ventilator leads from a closed room with no air inlets, the capacity will be reduced accordingly.

straight pipe in feet.. 2.5 3.3 114 114 4.1 5 2 214 S 8.3 3 10 314 4 11.7 13.3 The pressure loss due to friction inthe main leading tobase of riser can readily be added tothe pressure requiredat the base of a riser, thus: Required--the size of riser and main for a 10-story building 100 ft. high where the water use per floor as given by Table 1 for fixtures aggregates 100 gal. per floor: The computations as given in Table 3 show that the water flow re quired on the various floors is as follows: TABLE 7.

I am writing this on the supposition that you have gotten away from Paris by this time and `that you are now leading a life of sobriety and regularity^ Before I go any further with this note I want to ask *you to extend my very kindest regards and best wishes to m v good friends at Queen Anne*s Gate, especially to Mr.

If it is attempted to remove heavy dust such as lead oxides by an overhead hood the conditions may be worse than if no exhaust were used at all, owing to the rising air current carrying the dust up through the breathing zones.

dividual dust-collection units, installed close to the dust source, should be us^ Ducts leading to and from collectors should be as short and straight as possible HAZARDS OP COMBUSTIBLE DUST 575 .lowers for drawing dust-laden air into collectors should be on the clean-air sides ^collectors. 6.

., and American Blower Corporation; NESBITT HEATING SURFACE with Dual Steam-distributing Tubes, NESBITT SERIES H HEATING SURFACE, and NESBITT SERIES W COOLING SURFACE, sold by leading manufacturers of fan-system apparatus; WEBSTER-NESBITT UNIT HEATERS and AIR CONDITIONERS (See page 1039), distributed in U.

The w orst co n g ested s t r e e t s w i l l c e r t a i n l y be much b e t t e r than the vehicular tunnel; while the average s tr e e t w ill p r o b a b ly be so f r e e from lead t h a t i t w ill be im p o s s ib le to d e te c t i t or i ts absorption.

They will use approximately 5 c.c. of lead per Imperial gallon which would mean that one 50-gallon drum of ETHYL fluid would be required to treat 55,000 gallons, or between four and five drums for the total requirements of the Air Force for a year.