.*). ho = average unit thermal convective conductance from the leading edge of surface to the position x, Btu per (hour) (square foot) (Fahrenheit degree). hex = local unit thermal convective conductance, at the position x from the leading edge of surface, Btu per (hour) (square foot) (Fahrenheit degree). k = thermal conductivity, Btu per (hour) (square foot) (Fahrenheit degree per foot thickness).

Siedenburg baltim ore Refinery res Examination o f T etra-E tb y l Lead H andlers D o c tc rs Flem ing and R ankin o f th e DuPont Company n e t w ith D r.

The stabilizer used (not a lead product) is KDA 2U58 is the same as used in our KDA-29liO composition which is specified in the Government specification MIL-D-5850C (ASG) Distillation Kits, Sea, Water, Solar.

After caulking, the joint is sealed wit molten lead.

List Price 10 $ 8.00 17 14.00 10 8.00 17 14.00 10 20.00 17 35.00 Where stocks are carried: TACO is carried in stock by all leading boil er and radiator manufacturers at their branch showrooms; and by leading jobbing supply houses

M anfred Bowdifcch Lead Industries A ssociation 420 Lexington Avenue N ew Y ork C ity 17 D ear Manfred: Your left-h an d ed rem ark s to m e about m y p articip ation in the "La Luce" affa ir lea v e m e un disturbed.

Codes and Standards--(Continued) Subject Title Gases (Toxic) and Dust - (Continued) Lead and Certain Inorganic Lead Compounds Toluene Oxides of Nitrogen Methanol Styrene-Monomer Formaldehyde Methyl Chloride Trichloroethylene Heat Transfer (Walls) .

Gases (Toxic) and Dust American Standard Allowable Con centration of Harmful Gases: Carbon Monoxide Hydrogen Sulfide Carbon di-eulfi.de Benzene Cadmium Manganese Chromic Acid and Chromate t Mercury Metallic Arsenic and Arsenie Tri oxide Xylene Lead aad Certain Inorganic Lead Compounds Toluene Oxides of Nitrogen Methanol Styrene-Monomer Formaldehyde Methyl Chloride Trichloroethylene Heat Transfer (Walls) Tentative Method of Test for Ther mal Conductance of and Transmit tance of Built-up Sections by Means of Guarded Hot Box (1949).

It is felt that this method of proportioning the two ingredients will tend to encourage the use of higher lead concentrations in order to gain higher manganese concentrations

* I^ LEAD INDUSTRIES ASSOCIATION : m i mimi mi I ana 60 bit U2nd SUoott NfWTOW 17.

Manfred Bowditcb The Lead Industries Assoc. 420 Lexington Avenue New York 17 N.

EXHIBITORS Comprise leading firms in each phase of the industry; number has varied from 150 to more than 400 exhibitors.

I hope to be able to make these observations the basis of some consideration of future lead plant cites.

Pipe Sizes Engaged Length* In. 54 y* m Ma 4 IK 54 H IK 5i 5 IK 54 H 2 54 6 IKe 54 K 2K 8 1Ms 54 K* 3 l 10 1H 1 >5f 3K lHo 12 IK * Dimension shown is the normal tight-6t thread engagement from the leading edge of the female thread b&ck to the leading edge of the mala thread.

Lu c a s - (2) - O ct o b e r 20, 1955 th e actu al h asar d an d in preven tin g c a se s of lead in toxication .