1957 National Safety Congress mists, fumes, dusts.

1957 National Safety Congress Chemical Industries breathing problems 'would be cuufinrd to underwater or to travel m high altitudes.

.38 121. .

Other Volumes in this (1959) Series Users of this volume wiU find much value in Hs companion volumes, which offer the complete record of the 47th National Safety Congress!

any kind of inserts other than approved de vices Mufl Type Cup or muff type devices cover the exter nal ear to provide an acoustic barrier (Fig 38-8c) The attenuation provided by ear muffs vanes widely due to differences in size, shape, seal material, shell mass and type of suspension Head size and shape also influence the attenuation characteristics of these protectors The type of cushion used between the shell and the head has a great deal to do with attenuation efficiency Liquid or grease filled cushions give better noise suppression than plastic or foam rubber types, but may present leakage problems Amount of protection Commercially available earplugs if pro perly fitted and used, generally reduce noise reaching the ear by 25-30 dB in the higher frequencies (Fig 38-8a), which are conceded to be the most harmful This will provide ample protection against sound levels of 115 to 120 dB The better type of ear muffs may reduce noise an additional 10 to 15 decibels (Fig 38-8b), making them effective against sound levels of 130 to 135 dB Com binations of ear plugs and muffs give 3 to 5 more dB of protection In no case will total attenuation be greater than about 50 dB be cause at this point, bone conduction becomes significant Face and Eye Protection The protection of the eyes and face from injury by physical or chemical agents, or by radiation is of prime importance m any in dustrial safety program The eye and face protection standard.

&*&**& 'WTSROTlAl r'UtU.

October 17, 1955 MINUTES OF THE A3BELT0S TEXTILE INSTITUTE AIR HYGIENE COMMITTEE MEETING September 7, 1955 IN ATTENDANCE WIRE* D, R.

V Research Center February 25, 1952 436-R4* -- / ; HatORiSoApR FILE Donald A.

ASBESTOSIS RESEARCH COUNCIL SECOND ANNUAL REPORT FOR THE TWELVE MONTHS BEGINNING LST OCTOBER, 1958 1.

V \, 17.

CALIFORNIA SPRAY CHEMI CAL CORPORATION RICHMOND.

MINUTES OF THE MEETING OF THE NAPA BOARD OF DIRECTORS Edgewater Beach Hotel, Chicago, Illinois December 11, 1951 Information was submitted that the Detroit Gasket Manufacturing C,o. had advised the Association of its intention to discontinue supplying to NAPA its line of gasket materials, also that a proposal had been received from Victor Gasket Company to supply NAPA with a similar line as part of the Balkamp program.

Year 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 AMERICAN BRAKEBLOK DIVISION SALES TO NAPA DETROIT HEAVY DUTY THICK BLOCKS Cubic Inches Dollars 475,400 397,000 300,500 358,600 431,300 364,700 264,700 267,700 216,700 224,000 376,500 242,553 185,787 223,266 $ 31,512 24,371 19,572 23,382 28,233 23,854 18,067 17,599 13,708 14,150 ' 23,532 15,162 11,712 14,289 Sailing Price Per MCI 9 66.28 61.39 65.14 65.20 65.46 65.41 68.25 65.74 63.27 63.16 62.50 62.51 63.04 64.00 SCI 01970

Year 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 AMERICAN BRAKEBLOK DIVISION SALES TO NAPA GRAND RAPIDS HEAVY DUTY THICK BLOCKS Cubic Inches 95,500 88,700 74,500 114,800 146,300 42,700 84,400 92,600 99,500 69,600 101,600 93,281 87,056 143,375 Dollars 6,331 5,448 4,854 7,486 9,576 2,792 5,759 6,089 6,297 4,392 6,353 5,831 5,488 9,176 Selling Price Per MCI $ 66.28 61,39 65.14 65.20 65.46 65.41 68.25 65.74 63.27 63.16 62.50 62.51 63.04 64.00 SCI 01978

Year 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 AMERICAN BRAKEBLOK DIVISION SALES TO NAPA KANSAS CITY PASSENGER CARS Cubic Inches 465,600 551,400 604,000 - 659,200 650,800 649,300 692,300 736,700 777,400 817,500 824,300 814,116 949,745 915,082 Dollars $ 32,802 34,388 36,096 36,376 33,088 35,207 41,520 42,919 44,498 45,804 46,105 44,467 52,122 49,936 9 Selling Price Per MCI $ 70.45 62.37 58.11 54.41 56.13 54.22 60.02 58.26 57.24 56.03 55.93 54.62 54.88 54.57 SCI 01992