12 Sanitation: See Hygiene and Sanitation Sarcoma beryllium: in rabbits, 533 osteogenic: beryllium-induced: growth, 426 beryllium and Saturnism: See under Lead Sawyers, L.

Finish Coat--I00 lbs. white lead soft paste, 2 2/3 gal.' raw linseed oil, 3 pints turpentine, 1 pint liquid drit-r, total 6 1/& gal. paint.

^xane Analysis of the hexene extracts, after i'll tiont / ^ hpxiOd 3* 287 ' > of lead, corresponding to 3*13 r / i / y f '. by weight,, of the original sludge sample The sludge X altXrhpxfraction with hexane, wee filtered, and. wa alpsis of the flit SitmXi portion of water* .n- 108 g* lead as water soluble lead compounds* Steam ells sludge sample (77 x* having a ctem ' ` i the remainder of the original 6 > (18fi by weight} of an oil which had the odor of TEL* {& r e s u l t ^ indicate conclusively that the sluogo contains rjfnf appreciable amount of fhL, about 12% by weight based on tfcp above bird tests.

Too many of the facts are lacking to lead to completely satisfactory settlement of the problems.

LEAD OPERATORS; BLOCK, CLEAR AND TAG FOR MAINTENANCE. _ 3.

It was and Is my opinion that such a degree of exposure to 08-95 could lead to akin difficulties In workers.

Concrete does not withstand acids, and in some types of work employees consider con crete too hard and too cold Resilient non slip mats with low heat conductivity can be placed over the concrete where workmen must stand in one position for considerable periods of time Cork tile is desirable for its insulation, re siliency, quietness, high nonshp rating, and ability to withstand light traffic for long peri ods It is not suitable for wet locations or where there are heavy loadings, and it is ex pensive Cast iron plates with checkered or other wise roughened surfaces laid in cement or asphalt are suitable for some types of rough wear such as that in warehouses The slip ping hazard at the door sills of elevators may be reduced by installing steel grating filled with concrete Lead is used for floors exposed to acids and as a mat for secure footing near wood-working or other machines involving serious 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 qual ities, 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 ngid base and should not be used where there is excessive moisture or hydrostatic pres sure, as in basements A coating of bitu minous 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 electricity 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 m boiler rooms and over openings Parquet is laid on an underfloor and is suit able for offices If the material is sealed properly, little maintenance is necessary Par quet wears well but may be noisy Rubber flooring is resilient It also has high dielectric strength, which is undesirable where static electricity is a problem However, conductive types of rubber flooring are avail able Abrasive rubber flooring can be used to overcome slippenness Since terrazzo flooring has no joints m 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 neces sary to make the floor impervious to most acids The terrazzo mixture is slippery unless it includes abrasive aggregates Plants requiring extreme cleanliness and sanitary conditions, such as dairies, use ce ramic glazed tile It should be laid in Trin idad asphalt or m cement with a low lime content Two or three layers of asphalt roof ing felt may be laid beneath the tile Wood floors of the proper matenal and con struction are suitable for vanous 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 or jointed hardwood floor 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 gram parallel to the hne of truck travel Wood blocks meet many of the lequirements 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, ngid base, the floor is not likely to crack and will withstand heavy service Blocks impregnated with creosote are nec essary for floors in 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 391

Men who enter those tanks to clean thorn may be exposed to those volatilo lead compounds, unless they use precautionary mea sures which we have advised.

4,, Lfc Cleveland Printing and Sampling Chicago Tin Can Chicago White Lead Chicago CHetntcel Products Chicago Lithopene Chicago Coal Tar \ Chicago GenT Ufg, II .&&' --i** j Teul 1"* ?

Such as Kirksite A of National Lead Co.; Typical compost* tion 90*92% Zn. 4% Cu. 3.5*5% Al, less than 1% Mg.

These points rest on lead liners, supported by angles from the side of the casing.

Lead sulfide does not appear to be present, since only trace amounts of lead were detected in the membrane.

., and the application of a pressure of about two thousand pounds per square Inch, for about four hours, seed) 8.4 Oil modified phenol-formaldehyde resin___ Lead formate* 9.0 Potassium dlchromate 1.0 8.4 15 are suitable, It being understood that the pre ferred or optimum temperature, pressure and ap plication time stated above may be varied some what depending in part upon the particular com Vulcanized butadiene-acrylonitrile copoly position and the specific temperature, pressure mer synthetic rubber-like elastoprene (flnel^ divided dust-like particles, vulcan 20 and application time employed.

At the present time of course these buses are not using a leaded fuel to any extent since experimental work only is being done.

Effect of Dietary Lead on Reproductive Performance in Japanese Quail.