Open tank floats can be loaded with sand, lead or steel to bring them to a desired weight.

Sept. of winning all the tricks were nir.g the'opening lead he led 19 (APi__No, thanks.

Without such evaluation participation ^n recommendations on the establishment of standards would lead to . considerable litigation.

Chelaki This will confina ywire of Wednesday, November 22, in which we re qteunetsitoend tohfeDsrh.ipRm. eCn.t Cofhroinsetophuhnedr.redDtrw. eCnthyribstlooopdhelreaisd kouitrsmtoeditchael acotn ssoumlteanoft aoutroeurarglilearsscboenavderpsaltainontinanGdaicno,rArelsapboanmdae.ncYeotuhaatyIredceascllribfreodm an exposure to inorganic lead pigments as atmospheric dusts during the mmannaugfeaecetunrtehoasf athgereegdlatsos boeuardssufgogresotiuornrethflaetcttihvies perxopdousucrtes.beTfhoellloowceadl using your services for blood lead analyses.

as a mat for secure footing near wood-working or other machines involving senous danger to the operator if he slips and falls Lead is heat conductive, spark resistant, and quiet It should not be used for heavy trucking Zinc also is used for its spark-resistant qualities, but, compared to lead, it is attacked more readily by alkalies Floors in com pounding rooms where fire and explosion haz ards exist are zinc-covered in some plants Asphalt-base, vinyl-base or linoleum-type tile often is used in offices, laboratories, and workrooms where cleanliness and good looks are important The material is easily cleaned, noiseless, and a poor conductor of heat Magnesite is suitable for light traffic or where light oils are used It must be laid on a rigid base and should not be used where there is excessive moisture or hydrostatic pressure, as in basements A coating of bituminous paint is necessary to protect metals such as pipe from contact, since magnesite corrodes some metals Checkered steel plate wears well, but it is noisy and highly conductive of heat and elec tricity It is relatively nonshppery unless wom smooth or wet with oil Metal grille floors and gratings will not col lect dust, dirt, or liquids but, because of noise, are not often used where hand trucking is done regularly This type of floor material is particularly useful in boiler rooms and over openings Parquet is laid on an underfloor and is suit able for offices If the material is sealed prop erly, httle maintenance is necessary Parquet wears well but may be noisy Rubber flooring is resilient Italso has high dielectric strength, which is undesirable where static electricity is a problem How ever, conductive types of rubber flooring are available Abrasive rubber flooring can be used to overcome slippenness Since terrazzo flooring has no joints in the surface, its use eliminates some of the diffi culties that may be encountered with other types of flooring It can be made electrically conductive by grounded grilles It is a con ductor of heat Suitable sealers are necessary to make the floor impervious to most acids The terrazzo mixture is slippery unless it in cludes abrasive aggregates Plants requiring extreme cleanliness and sanitary conditions, such as dames, use ce ramic glazed tile It should be laid in Trin idad asphalt or in cement with a low lime con tent Two or three layers of asphalt roofing felt may be laid beneath the tile Wood floors of the proper material and con struction are suitable for various services ex cept for the obvious objection of a fire hazard Plank or board floors of the softer woods are generally unsatisfactory and a source of nu merous injuries from slipping and falling as well as from splinters and truck accidents A good floor for light manufacturing can be made From matched orjointed hardwood Boor ing nailed to a subfloor structure or to sleepers in concrete The thickness of the hardwood flooring will depend on the service to which it will be subjected It is laid with the grain parallel to the line of truck travel Wood blocks meet many of the require ments for a good floor Properly made, a floor of this type is relatively noiseless and does not become slippery or cause fatigue If the blocks are laid on a smooth, rigid base, the floor is not likely to crack and will withstand heavy service Blocks impregnated with creosote are nec essary for floors m contact with liquids or moisture Expansion joints are required along walls, columns, and similar places If blocks are laid with a high melting point pitch, hot weather does not create problems Oils and organic solvents, however, cause trouble because of their solvent effect on bi tuminous fillers and coatings To reduce tracking of mud and dirt into a building, moisture-absorbing mats or runners can be installed at entrances Special floonng Special types of floonng are necessary where fires or explosions may occur Sparkresistant and conductive floonng should be specified where flammable vapors, dusts, or gases are present Conductive floor resistance (as measured between two electrodes placed 3 ft apart at any points on the floor) may vary from not less than 25,000 ohms to not more than 1,000,000 ohms, according to NFPA's Flammable Anes thetics Code Standard No 56, to assure pro tection against electnc shock and still provide for removal of static These floors can be grounded at two or more points by means of copper strips stapled to the material or copper 415

Elements of Industrial Toxicology similar to the better known "zinc chills" or "zinc shakes" caused by inhalation of freshly formed zinc oxide fumes Heavy exposure to magnesium oxide is irritating to the eyes and nose and throat, but the material is not a severe primary irritant Finely powdered magnesium is a fire haz ard, and severe injuries and deaths have oc curred from ignition of powdered magnesium in the clothing of workers who have done hand grinding on magnesium alloys Also, fires and dust explosions have occurred m exhaust systems carrying powdered magne sium from grinding operations Exhaust systems should go as directly as possible to a dust separator which will re move the magnesium powder and trap it under water without permitting it to get into the main exhaust svstem The wet powder from these dust collectors and turning-chips that are wet with coolant should be removed from the plant as soon as they are taken from the collecting equipment Workers in magnesium-gnndmg operations should be provided with and required to wear flame-resistant clothing Massive pieces of magnesium in the form of castings or machined work are not a severe fire hazard because they are hard to ignite When once ignited, however, the metal in the massive forms will bum vigorously See Industrial Data Sheet 426 and Hygienic Guide Malathion (O.O-dimethyl dithiophosphate of diethyl mercaptosuccinate) is one of the organic phosphate insecticides Like the others of its class, its principal toxic action on warm-blooded animals is its inhibition of acetylcholinesterase It seems to be one of the least toxic of this tvpe of insecticide In halation of 5 ppm (56 mg/cu m) by dogs and guinea pigs produced no effects except tears and a slight decrease in the plasma cho linesterase activity Maleic anhydride is an irritant to the skin and mucous membranes, especially in the presence of moisture Maleic anhydride does not usually cause an immediate burning sen sation upon contact with the skin, especially if the skin is dry If not removed by washing, it will cause reddening and, occasionally, blistering, if the exposure is prolonged and severe Maleic anhydride dust and vapors are exceedingly irritating and severe acute exposures are not voluntarily tolerated Upon inhalation of dust or vapors, coughing and sneezing, together with burning and irritation of the throat may occur The eyes are partic ularly sensitive to the dust and vapors Ma leic anhydride is not a senous industrial hazard provided workers are adequately mstnicted and effectively supervised in the proper handling of the chemical Employees should be instructed to report any signs of irritation or burning of skin, eyes, or mucous membranes Because maleic anhydnde is a combust ible solid having a flash point of 102 C, care must be exercised in handling and storage to keep it away from flame or sparks Dust and the vapors from the molten product are also flammable Manganese is found in a wide variety of minerals The dioxide is its most common inorganic compound and is used as a chemical intermediate, enamel additive, and drier The probability of contracting manganese poisoning is low, but the effects are severe -- total disablement may result from a few months' exposure to high concentrations This effect, however, is more likely to occur after prolonged and repeated exposures above 30 mg/cu in The main hazard is usually from the inhala tion of manganese dioxide, which may pro duce neurological lesions The symptoms are many and are similar to Parkinson's syndrome Symptoms include weakness, instability, difficulty in walking, immobility of facial expression, monotonous and inter mittent speech, spasmodic laughter, and other grotesque signs Exposures to finely divided dusts of manganese dioxide mav produce pneumonitis See Industrial Data Sheet 306 and Hygienic Guide Mercury and its compounds are not nearly so widelv used as are lead compounds and consequently mercury poisoning is not so well known nor so often seen as is lead poi soning Mercury metal is a liquid at room tempera ture with a vapor pressure high enough to produce poisoning if a considerable area of the metal surface is exposed to air If mer cury gets into the cracks of a wood or tile floor 1356

This will allow cells to breathe normally and refresh their biological functions, leading to much better skin appearance.

Anaconda Lead Produets Company was then dissolved and its assets transferred to Inter* national Smelting and Refining Company, (see Surplus Account sehsduls IX (b)).

JMiiTfirtWiBir7i^iirftniirtnfrfrmrn i< trigiMr- in * RED LEAD PAINTS for GALVANIZED STEEL, RUSTED, WEATHERED r TREATED NEW l' UiMfienaw * to Lm . ..............................I to lu fturfmiiaiTiow r P m iw In, Bonn Wluman Tibia Nav. . . > Fo b Om Oar Anuonm . ............................ taAmciiwWni*TOMTliwalto I MUWTitoaltiaaiiii LIAO INDUSTiltt ASSOCIATION W UxmTON IVM NawVwttMlV.

Dryer "A" Operator Dryer Lead Operator (jX All of the above 28.

Phillips regarding environentel. including telephone conference in preparation for nesting with client regarding discussion of the issues relative to potential environmental concerns at Tyler Pipe facility; prepare for meeting with Tyler by research OSHA standards on blood lead levels; conference regarding same; review OSHA standards on blood lead contamination; meeting with Tyler regarding envlronswntal issues at Tyler Pipe; travel to Tyler, Texas for meeting; attend meeting regarding environmental Issues in preparation for report to the Board of Directors of Tyler Corp. regarding same.

Dirt collection of the rutile "Ti-Cal* formulation is heavier than with anatase titanium dioxide products, but not as heavy as lead-in-oil.

Wilmington, Delaware EXPLOSIVES Blasting Powder Blasting Supplies Charcoal Clay Mining Farm Explosives Industrial Dynamites Land Gearing Permissible Explosives Refined Nitrate of Soda G Road Building O Saltpetre Tree Planting Wood Pulp SPORTING POWDERS Black Sporting Powder Hand Trap G Hunting G Pistol Smokeless Powder G Resort Shooting G Rifle Smokeless Powder G Shooting in Colleges G Shooting on Boats G Smokeless Powder G Trapshooting PAINTS G Antoride Iron Paint Q Auto Finish G Auto Paints and Enamels Bam Paint Q Bridgeport Standard Paint Q Bridgeport Wood Finishes Q Colors in Oil G Concrete Paint O Decorative Stains Dulite for Mills Q Enamels O Ferro-Keep (Metal Paint) Floor Paints Q Floor Varnishes Q Flowkote Enamel G Industrial Paints G Japans G Marine Paints Q Railway Paints Red Lead Q Sanitary Wall Finish G Shellac G Shingle Stain G Smokestack Paint Town and Country Paint Q Varnishes Q Victrolac Stain Finish O Vitrolac Varnish Wagon and Carriage Paint G Wheeler's Wood Killer G Wire Screen Paint CHEMICALS Q Acids Q Alums G Barium Chloride Q Belt Cement G Benzol Products G Blanc Fixe O Bronze Powder G Bronzing Liquids Q Carpolene (Wood Preservative) Q Carpo (Metal Paint) Q Coke G Creosote D Dead Oil Distilled Water Q Dry Colors G Ether Heavy Chemicals Household Cement Q Leather Renovators Q Leather Substitute Solutions G Litharge Q Lithopone O Mantle Dips Q Metal Lacquer Q Nitre Cake Q Parlodion Q Patent Leather Solutions Q Pegamoid Aluminum Paint Q Pitch G Pontar Q Pontoklene Pulp Colors G Py-ra-lin Enamel Q Pyroxylin Solutions O Rubber Makers White G Salt Cake G Shingle Oil G Solvents G Split Leather Solutions G Waterproof Cement Q White Lead G Wood Lacquer Wood Oil PY-RA-LIN G Brushes Challenge Cleanable Collars G Colored Sheeting Q Combs G Desk Sets O Manicure Sets G Mirrors O Novelty Sheeting Q F*y-ra-lin Rods and Tubes O Py-ra-lin Specialties G Py-ra-lin Toilet Goods G Toilet Sets G Transparent Sheeting COATED TEXTILES G Auto Truck Special Fabrikoid O Book-Finish Fabrikoid G Buggy Aprons Q Craftsman Fabrikoid G Fabrikoid for Baggage Fabrikoid for Home Uses Fabrikoid for Railroad Uphol stery and Vestibule Curtains G Fabrikoid for Upholstering Q Fabrikoid Sheeting Fairfield Rubber Coated Cloth Hat Sweat Material Marine Special (U.

He is to report any out-of-spec samples immediately to the lead Operator. 2.

ijtMtSi&fn0v{rrfGallon in the form of chloracr.e, systematic Intoxication I leads to nausea, vomiting, loss or weight, edema and abdominal pair g(Mir.f.C> ano fiS Aio PROCEDURES ----------------------------------------------------------------------- ----------- - Remove from exposure.