﻿28 



The Philippine Journal of Science 



1914 



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



(Calendar year 1904.) 



Month. 



Number of rats on- 



January ... 

 February .. 



March 



April 



May 



June.. 



July 



August 



September . 



October 



November - 

 December.. 



Total - 



Steam- 

 ers. 















461 



165 



153 



6 



164 



83 



146 



260 



85 



1.513 



Schoon- 

 ers. 





 

 



25 

 106 



19 



25 

 9 

 

 



10 

 9 



203 



Eiver 

 craft. 



All 



vessels. 















490 



261 



172 



31 



173 



83 



146 



270 



94 



Number of vessels- 



Having 

 rats. 















38 



51 



20 



8 



7 



1 



11 



20 



8 



Having 

 no rats. 



1,720 



164 















6 



45 



12 



20 



13 



18 



10 



16 



4 



143 



Fumi- 

 gated. 





 

 

 44 

 96 

 32 

 28 

 20 

 19 

 21 

 35 

 12 



307 



TabL£ VI. — Kinds of vessels on tvhich rats were destroyed. 



(Calendar year 1903.) 



Vessels. 



Rats. 



Percent- 

 age of 

 vessels 

 having 

 rats. 



Kind. 



Total. 



Having 

 rats. 



Having 

 no rats. 



Total. 



Average 



in all 

 vessels. 



Average 



in vessels 



having 



rats. 



Steamers 



168 



134 



6 



99 

 63 

 2 



69 



71 



3 



1.513 

 203 



4 



9.00 

 1.51 

 0.80 



15.28 

 3.22 

 2.00 



58.93 

 47.01 

 40.00 



Schooners 



River craft 



All vessels 



307 



164 



143 



1,720 



5.60 



10.49 



53.42 





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



(Calendar year 1903.) 



Month. 



Number of rats on — 



Number of vessels- 



Steam- 

 ers. 



Schoon- 

 ers. 



River 

 craft. 



All 



vessels. 



Having 

 rats. 



Having 

 no rats. 



Fumiga- 

 ted. 



January 



112 

 26 

 38 

 10 



246 



236 

 46 



274 

 65 



327 

 12 

 81 



48 

 19 

 16 

 14 

 10 



5 

 35 

 18 

 24 



9 

 21 



6 





 

 

 2 

 

 

 3 

 

 

 4 

 

 



160 

 46 

 64 

 26 



266 



241 

 84 



292 

 89 



340 

 33 

 87 



29 



9 



9 



7 



19 



16 



12 



13 



14 



9 



13 



14 



23 



26 



17 



17 



8 



5 



4 



8 



6 



10 



5 



3 



52 

 36 

 26 

 24 

 27 

 20 

 16 

 21 

 19 

 19 

 18 

 17 



February 



March 



April 



May 



June - _- - 



July . . 



August _ -. 



September .. . . . 



October -. 



November 





Total 



1.473 



225 



9 



1.707 



163 



131 



294 





