248 



The Philippine Journal of Science 



1914 



Table IV. — Output of various furnaces per day and smelting run — Contd. 



FURNACE No. 4. 



Number of days furnace in blast. 



Plowshares produced. 



Plow- 

 points 

 pro- 

 duced. 



Total. 



First 

 size. 



Second 

 size. 



Third 

 size. 



Pairs. 



1 

 Kilos. 



1 



Pairs. 

 14 

 15 

 15 

 21 

 20 

 20 

 25 

 23 

 22 

 20 

 22 

 20 

 20 

 22 

 20 

 20 

 24 

 23 

 14 

 20 

 16 

 12 

 6 

 20 

 20 



Pairs. 

 6 

 15 

 18 

 21 

 23 

 20 

 21 

 23 

 20 

 21 

 20 

 21 

 17 

 16 



19 

 17 

 18 

 21 

 9 

 26 

 24 

 30 

 19 

 26 

 27 



Pairs. 

 10 

 21 

 18 

 20 

 24 

 21 

 17 

 23 

 20 

 19 

 20 

 20 

 18 

 17 

 19 

 17 

 19 

 16 

 15 

 19 

 18 

 23 

 15 

 26 

 24 



Pairs. 

 10 

 29 

 29 

 38 

 43 

 49 

 47 

 51 

 48 

 50 

 48 

 39 

 45 

 46 

 42 

 46 

 49 

 50 

 62 

 65 

 42 

 40 

 20 

 48 

 46 



40 

 80 

 80 

 100 

 110 

 110 

 110 

 120 

 110 

 110 

 110 

 100 

 100 

 100 

 100 

 100 

 110 

 110 

 100 

 120 

 100 

 105 

 60 

 120 

 117 



138 

 272 

 274 

 350 

 380 

 388 

 394 

 422 

 390 

 390 

 390 

 350 

 356 

 358 

 352 

 358 

 392 

 396 

 370 

 424 

 368 

 356 

 198 

 410 

 424 



2 . 



3 .. 



4 



6 



6 



7 . 



8 . 



9 



10 



11... 



12. _ 



13 . 



14 . 



15 



16. 



17 



18 



19 



20 . 



21 



22 



23 ... 



24 



25a . 



Total 



474 



498 



479 



1,071 



2,522 



8,900 





° Furnace blown out for lack of charcoal. 



The tabulated records show that the process yields from 200 

 to 400 kilograms of metallic iron per day from each furnace, but 

 it is probable that 250 kilograms, or about 80 pairs, is a fair 

 average figure for daily runs throughout the district. 



Efficiency of the smelting process. — The following table sets 

 forth the data with respect to the smelting industry in 1913, 

 from which an idea of efficiency of the process can be obtained. 



