﻿30 The Philippine Journal of Science 



Table XI. — Rats destroyed on vessels by sulphur fumigation. 



(Calendar year 1906.) 



1914 



Month. 



Number of rats on— 



Number of vessels- 



Steam- 

 ers. 



Schoon- 

 ers. 



River 

 craft. 



All 

 vessels. 



Having 

 rats. 



Having 

 no rats. 



Fumi- ] 

 gated. 



January 



10 

 



10 







2 



169 



205 



56 

 7 



58 



23 

 8 





 

 5 

 

 

 2 

 

 9 

 23 

 12 

 

 1 





 

 

 15 

 

 

 

 

 

 

 

 



10 







15 



15 



2 



171 



205 



65 



30 



70 



23 



9 



1 

 

 3 

 1 

 1 



19 

 14 

 12 

 3 

 8 

 2 

 3 





 1 

 

 2 



1 

 

 

 1 

 



1 





 



1 

 1 

 3 

 8 

 2 



19 

 14 

 13 

 3 

 9 



3 



February _ 



March _ 



April 



May 





July ..._ 







October 



November 



December 



Total 



548 



52 15 



615 



67 



6 



73 



Table Xll.— Kinds of vessels on which rats were destroyed. 

 (Calendar year 1906.) 



Vessels. 



Rats. 



Percent- 

 age of 

 vessels 

 having 

 rata. 



Kind. 



Total. ««^,"« 



Having 

 no rats. 



Total. 



Average 



in all 

 vessels. 



Average 



in vessels 



having 



rats. 





89 



13 



1 



55 

 11 



1 



4 

 2 

 



548 

 52 

 15 



9.30 

 4.00 



9.98 

 4 73 



93.22 



84.61 

 100.00 



Schooners 



River craft 



15.00 15.00 



All vessels _ 



73 ! 67 



6 



615 



8.42 i 9 18 



91.78 













Table XIII. — Rats destroyed on vessels by sulphur fumigation. 



(Calendar year 1907.) 



Month. 



Number of rats on — 



Number of vessels — 



Steam- 

 ers. 



Schoon- 

 ers. 



River 

 craft. 



All 



vessels. 



Having 

 rats. 



Having 

 no rats. 



Fumi- 

 gated. 



January _ . _ _ 



20 



67 



110 



262 



66 



28 



38 



24 







37 



51 



14 



1 



12 



11 



14 



6 















13 



2 



10 



4 





 

 



1 



40 

 

 

 

 

 

 

 



21 



79 



121 



277 



112 



28 



38 



24 



13 



39 



61 



18 



2 



8 



26 



18 



10 



2 



5 



4 



1 



7 



12 



4 





 1 

 1 

 

 1 

 1 

 8 

 2 

 3 

 5 

 2 

 



2 



9 



27 



18 



11 



3 



13 



6 



4 



12 



14 



4 



February - 



March . __ 



April .. 



May.- ___>_-- 



June 



July. 



August 



September. 



October.. 



November 





>- 

 Total 



717 



73 



41 



831 



99 



24 



123 





