102 



The Philippine Journal of Science 



genously welded cylindrical iron shell, lined with asbestos fiber 

 and fire brick. The contour, dimensions, and cross section of 

 the producer are shown in fig. 2. 



Starting from the grate surface the inside contour of the producer is 

 formed by a cylinder, A, 75 centimeters in diameter and 85 centimeters 

 high, by an inverted truncated cone, B, 48.8 centimeters high and 130 and 

 75 centimeters in diameter at the top and bottom, respectively, and by 

 another cylinder, C, 130 centimeters in diameter and 54.3 centimeters high. 

 The upper part is as shown in the figure. The distance from the grate 

 surface to the cover plate of the producer is 211 centimeters, and the 



