11 American Society of Heating and Ventilating Engineers Guide, 1928 Pipeless or One-Pipe Furnaces Section 10. a.

American Society of Heating and Ventilating Engineers Guide, 1928 LINER, John J., (Associate 1916), Pres., (for mail), Philadelphia Asbestos Co..

American Society of Heating and Ventilating Engineers Guide, 1929 or periodic service.

American Society of Heating and Ventilating Engineers Guide, 1929 F ig . 2.

American Society of Heating and Ventilating Engineers Guide, 1929 harmful, there is general agreement that very high or very low humidities indoors are to be avoided.

American Society of Heating and Ventilating Engineers Guide, 1929 The high speed of these fans makes necessary heavier construction, larger shafts and bearings.

American Society of Heating and Ventilating Engineers Guide, 1929 The power required for such fans is proportional to the volume of the air moved, and to the pressure overcome.

Insulation, Building and Sound Deadening LOS ANGELES Pennrich & Company, Inc. 29 Broadway, New York f TORFOLEUM MAILLIARD & SCHMIEDELL SAN FRANCISCO PORTLAND SEATTLE VANCOUVER Torfoleum is made of dried Sphagnum Moss and its record of performance under actual working conditions, over a period of years, has demonstrated conclusively that it is a highly efficient insulating sheet.

American Society of Heating and Ventilating Engineers Guide, lflaoM Determining the Quantity of Dust in Air by Impingement, by F.

American Society of Heating and Ventilating Engineers Guide, 193^ ~ A thermal conductivity method may also be. used to measure carbon dioxide in air over a range of 0 to 1.5 .per cent7.

Heating Systems Pump, Buffalo Pumps, Inc. 450 Broadway, Buffalo, N.Y.

Registered Mar. 8, 1927 Trade-Mark 225,049 Renewed March 8, 1947 to Johns-Mansvilie Corporation, of New York, N.

840 CHAPTER 53 ` Table 3 ....

-77- dusts of the following size characteristics: 99 per cent smaller than 2. 80 microns 95 n 90 ii ti it nn " . 1. 80 " " 1.40 " 60 it ii ii " 1.00 " 70 n ti ii " C. 85 " 60 ti ti it " 0.72 " 50 n n ii " 0.60 " It will be noted that 80 per cent of the dus~ used in these approval tests is below one micron (l/25,000th of an inch) and 50 per cent is below 0.6 microns.

jured worker for a new occupation or for ways of continuing in his old one Usually, voca tional rehabilitation is assigned when medical treatment fails to restore the worker to the job he held when injured The worker's in jury may be so severe or his work require ments such that residual impairment prohibits effective performance Workers with such impairment must be trained to surmount or by-pass the residual limitations Many will enter new occupations In practice, the more effective the medical rehabilitation, the less the need for vocational rehabilitation This definition of vocational rehabilitation distinguishes it from medical rehabilitation more than it should.