BOUSE WTW WWWtATTCM OllC'MQ LEAD LAW Hr. 8.

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I - Heating Systems Specialties The Clark Manufacturing Company 1830 E. 38th St., Cleveland 14, Ohio Established 1908 * Clark, manufacturers of steam specialties for 39 years, produces a complete line of fluid controls.

/ Publications Domestic Engineering Publications 1900 Prairie Avenue, Chicago 16, Illinois 8 TIMES A WINNER!

REFERENCES 1.

tol Annex, PO Box 44063, Baton Rouge 70804 Division of Occupational Safety and Health (Director) Division of Boiler Inspection (Director) Workmen's Compensation (court administered) Marne Department of Labor and Industry (Commis sioner), State Office Bldg, Augusta 04330 Division of Boiler Inspection (Chief Inspector) Division of Industrial Safety (Director) Division of Elevator Inspection (Supervising Inspector) Industrial Accident Commission (Chairman), ad ministers workmen's compensation.

An intolerable rise in body temperature, as well as localized damage, can result from an exposure of sufficient intensity and time In addition, flammable gases and vapors may ignite when they are inside metallic objects located in a microwave beam Power intensities for microwaves are given in units of watts per sq cm Areas having a power intensity of over 0 01 watt per sq cm should be avoided In such areas, dummy loads should be used to absorb the energy output while equipment is being operated or tested If a dummy load cannot be used, adjacent populated areas should be protected by adequate shielding Infrared radiation does not penetrate below the superficial layer of the skin so that its only effect is to heat the skin and the tissues immediately below it Except for thermal burns, the health hazard is negligible Excessive exposure of the eyes to radiation, mainly visible and infrared radiation, from furnaces and similar hot bodies has been said for many years to produce "glass blower's cataract" or "heat cataract " This condition is an opacity of the rear surface of the lens of the eye It was first reported among the hand blowers of glass m England in 1903 and be came compensable in England in 1908 An investigation (see Karl L Dunn in Ref erences) conducted in an old plant produc ing borosihcate glass, where the heat exposure is much higher than it is in the production of the soft glasses on which heat cataract was first observed, failed to show any cases, although many of the employees have been exposed to the work for more than thirty years Although this investigation concerned only one company and too small a number of employees to be conclusive, the exposure was at least double that in the soft glass works from which the original reports were made, and the exposures of many of the workers had been long enough to throw a good deal of doubt on the production of the condition in the modem glass industry This doubt should not, however, be per mitted to obscure the necessity for the pro vision of proper eye protection for men ex posed to high visible glare, which is usually so intense as to require the employee to wear protective goggles Routine, low-temperature operations emit ting little visible light may be encountered, attention to eye protection must also be given Visible radiation and ultraviolet radiation also do not penetrate appreciably below the skin, their effects are essentially heating on the surface The effects of the ultraviolet waves are much more violent than are those of the visible or infrared--a severe bum can be produced with no warning whatever and significant damage to the lens of the eye can occur from excessive exposure Since ultraviolet radiation in industry may be found around electric arcs, they should be shielded by materials opaque to the ultra violet Opacity in the ultraviolet has no rela tion to opacity m the visible part of the spec trum Ordinary window glass, for instance, is almost completely opaque to the ultraviolet although transparent to the visible A piece of plastic dyed a deep red-violet may be al most entirely opaque in the visible spectrum and transparent in the near ultraviolet Electric welding arcs and germicidal lamps are the most common strong producers of ultraviolet m industry The ordinary fluores cent lamp generates a good deal of ultraviolet inside the bulb, but it is essentially absorlied in the glass bulb and its fluorescent coating, although mild skin irritation from fluorescent lamps that burned within a few inches of the skin during a full day for several days has been reported The most common exposure to ultraviolet ladiation is from direct sunshine Men who continually work outdoors m the full light of the sun may develop tumors on exposed areas of the skm, and these tumors occasion ally turn malignant Ultraviolet radiation from the sun also increases the skin effects of some industrial poisons After exposure to compounds such as cresols, the skm is exceptionally sensitive to the sun Even a short exposure m the late afternoon when the sun is low is likely to produce a severe sunburn There are other compounds which minimize the effect of UV-rays Some of these are used in certain protective creams Lasers Lasers emit beams of coherent light of a 1057

-4`1 PLAINTIFF'S EXHIBIT '6 ^ojc*. y <-*?

362 OCCUPATIONAL TUMORS AND ALLIED DISEASES Doering, H., Arch. f. klin.

This Memorandum Sr.dii"#,,^.d9;r.r,,a' Bill of Lading has been issued and is not the Original Bill Lading, nor a copy or duplicate, covering the property named herein, and is intended solely for filing or record Older No 4539S5~157 Customer P 0 / Release eamer _ SOUTHERN PACfflC SCAC.

is an acknowledgment that a Bill of Lading has been issued and is not the Original Sill Order No This Memorandum 453985-009of Lading, nor a copy or duplicate, covering the property named herein, and is intended solely for filing or record. 3/L Nc 453985-009 Customer PO /Release Ca^pacific----------------------------------------------- _SCAC_ RECEIVED, Subjcl^^^iJjscations and tariffs in effectthe date of the issue of this Bill of Lading.

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