XI, A, 3 Thurlow: Manufacture of Lime in the Philippines 131 



The arrangement of the fan made it impossible properly to 

 sample the flue gases on the first run, but this was corrected 

 for the second run. The temperature of the kiln gases in a 

 well-regulated kiln should not exceed 100°C. The temperature 

 of the flue gases in our first run was much too high, and the 

 loss from this cause represents at least 10 per cent of the coal 

 consumed. In order to reduce this value, some changes were 

 made in the kiln. To increase the efficiency of the preheating 

 zone, the kiln was increased in height by 2.5 meters, and holes 

 were made in one side of the kiln at intervals of 0.6 meter, from 

 the grates to the top, so that, in case the kiln became clogged, 

 iron bars could be inserted without interfering with the fire box. 



The modified kiln is shown in Plate II. Because of the changes 

 required in the kiln, and on account of other work, I was 

 unable to continue the experiment for some time. On April 

 27 the kiln was charged for the second run. The charge con- 

 sisted of 2,500 kilograms of rock, 10 centimeters in diameter. 

 The results of this run are given in Table II. 



Table II. — Results obtained from second experimental run. 



Date. 



1 



Run. 



Fuel 

 burned. 



Lime pro- 

 duced. 



Coal or 



wood on 



lime. 



Lime per 



kilo of 



coal. 



1915. 

 Apr. 28 to 29 



Hours. 



24 



(•>) 



24 



24 



Kilos. 

 a 258 



Kilos. 

 612 



Per cent. 

 42.2 



Kilos. 

 2.37 



Apr. 29 to 30 . 



Apr. 30 to May 1 



a 464 

 a 515 



1,086 

 1,292 



42.7 

 39.8 



2.34 

 2.51 



May 1 to 2 . 



Total 



72 

 24 

 24 



1,237 



2,990 









41.3 

 65.2 



2.42 

 L53 



May 2 to 3- 



<=849 



1,301 





Date. 



Lime per 

 hour. 



Gas analyses. 



Temper- 

 ature. 



Oxygen. 



Carbon 

 monox- 

 ide. 



Carbon 

 dioxide. 



1915. 

 Apr. 28 to 29 _ 



Kilos. 

 25.5 



17.1 



0.3 



5.4 



°C. 

 163 



Apr. 29 to 30 



Apr. 30 to May 1 



45.8 

 63.8 



16.5 

 16.8 



0.0 

 0.0 



6.1 

 6.0 



195 

 185 



May 1 to 2 



Total _ 













Average 



41.5 

 54.3 



16.8 

 19.8 



0.1 

 0.0 



5.7 

 LI 



181 

 204 



May 2 to 3 





•Coal. 



* Kiln overdrawn — no lime, 



<^ Wood used as fuel. 



