v.

Federal; Register /-;yql._:5'Uj.No. :119, / Friday, june; Appendix Gto1826.58---VYork Practices1 ; ^ ; ^Use of Clove, bags andEngineeringControlsfor Small-Scale, .....

Burners, Oil Automatic Burner Corp. 1823 Carroll Avenue Chicago, Illinois Domestic Oil Burners -- Range Burners Water Heaters -- Special Products ABC Oil Burners are built in five models in the rotary atomizing type and four sizes of pressure atomizing burners.

Heating Systems Burners, Oil Herco Oil Burner Corporation Lancaster, Pa.

li'M Iitljl'!

Air System Equipment Ventilators Western Engineering & Mfg.

Dr.

ii 500 OCCUPATIONAL TUMORS AND ALLIED DISEASES appreciable increase in the proportion of the malignant neoplasms, as is evident from the following evaluation of 62 instances collected from the European literature: Years Benign tumors Malignant tumors 20-30 1 o 3J-40 2 6 4I~5 3 22 5I~So 2 29 61-jo 0 7 As the European tumor of this type usually is not discovered during an early developmental stage, these figures suggest the possibility that some of the benign tumors undergo malignant transformation at some point in their course and thereby increase the proportion of malignant tumors in the older age groups.

28 Am.

American Society of Heating and Ventilating Engineers Guide, 1925-26 INSTALLATION DATA All pumps should be set on substantial foundations and be provided with heavy cast iron sub-bases, securely anchored to foundation and pro vided with drip ring with drain properly connected to sump or sewer.

American Society of Heating and Ventilating Engineers Guide, 1925-26 under conditions of unrestricted flow of air to the ventilator, are given by., the equation: where Q=A X 36 X ^.H X (fl - lo) 6+ V + 20.

American Society of Heating and Ventilating EngiKeers Guide, 1926-27 of hot water made is overhead, where it is not required, and in order to heat the floor coils from end to end, and it is impossible to heat them evenly from end to end, a little larger fire must be maintained than would be necessary if the coils were in two rows, i.e., going and coming, flows and returns under the benches. ' With gravity hot water heating, boilers should always be in pits.

American Society of Heating and Ventilating Engineers Guide, 1926-27 EFFECT OF AIR VELOCITY ON LOSSES FROM INSULATED SURFACES In the case of well-insulated surfaces the increases in losses due to air velocity are very small as compared with increases shown above, for bare surfaces, because of the fact that air flowing over the surface of the insulation can increase only the rate of heat transfer from surface to air, and cannot change the internal resistance to heat flow inherent in the insulation itself.

American Society of Heating and Ventilating Engineers Guide, 1928 Fig. 9.

American Society of Heating and Ventilating Engineers Guide, 1928 Under this condition the capacity of the furnace at the furnace bonnet' per square foot of grate area is 43,300 B.t.u. per hour, and per square inch of grate it is 300 B.t.u. per hour.