^PRODUCTION OF PIT WELLS. 



*95 



The figures in this table differ so widely that it is not difficult to 

 see that some must be erroneous. Unfortunately there are no means 

 of checking them, all what I can do is to express my personal opinion. 

 I believe that Captain Cox and Mr. Crawfurd's estimates are too 

 high, while it is quite certain that Captain McLeod's estimate is 

 much too low. As regards the estimates of the members of the 

 Mission to Ava, I believe that Dr. Oldham's first estimate is too high, 

 while his second is probably a little too low. It is further beyond 

 any doubt that the average of 200 viss per well in Twingon, as esti- 

 mated by Captain Yule, is too high, while his estimate for Berne is 

 equally too low. Captain Strover's estimate seems fairly correct, 

 while that of the Burmese Minister seems apparently too low. 



It seems perfectly clear that estimates regarding the monthly pro- 

 duction will still more widely differ, not only on account of the estimat- 

 ed average production per well, but chiefly because the number of 

 productive wells greatly varies according to the different observers, 

 as already pointed out on page 175. 



Now the following table will show the monthly production of the 

 Yenangyoung oil field, as estimated at different times :— 



Table showing the monthly production of the Yenangyoung 

 oil field during the period ifgS to i8g6. 



Year. 



Reference. 





Monthly production 







in viss @ lbs. 3*65. 



1795 



. Colonel Symes . 



4!°35>9°o 



1797 



• Captain Cox 



.... 



• 4,74S,ooo 



1826 



. Mr. Crawfurd • 



• . • . 



. 1,464,000 



1835 



. Captain Hannay • 



• . » . 



• 4>743>°o° 



1838 



. Captain McLeod . 



• ... 1 



117,120 



1855 



. Dr. Oldham 



• • . • 1 



, 900,000 



1855 



Do. different estimate 



37S,ooo 



1855 



. Captain Yule • 



• • * . . 



596,000 



1873 



. Captain Strover • 



..... 



500,000 



1879- 



81 . Burmese Minister 



• . . . . 



400,000 



1886 



. Dr. Romanis • 



• . • • • 



600,000 



1886 



.Sir Charles Bernard 



• . . . . 



500,000 



If we assume all these figures 



to be correct, the production must 



have largely 



fallen off since the end of the last century, but we will at 



2 







( 241 ) 



