The Bulletin. 5 



with a No. 1 sun hinge burner and a No. 27 Macbeth chimney. No. 

 1 American wicks recently dried were allowed to soak in the oil over- 

 night. The oil level dropped 30 mm. during the burning period. 

 Over 150 cc. of oil remained at the end of each test. Duplicate tests 

 were made on most of the samples. 



The Marcy patent burner was found unsuited for this work unless 

 a much longer burning period were adopted. 



Too much importance should not be attached to small differences 

 in percentage drop in candle power, as the results are comparable 

 only for the conditions under which the tests were made. 



OILS TESTED. 



The analyses given are for all samples taken by inspectors during 

 February, March and April, 1911, except samples of mineral seal 

 oil and samples from store tanks. The tests were made on a composite 

 sample of each brand after filtering the oil. 



"Tank car" samples are from storage tanks, tank cars and barges. 



Where oils have been shipped and sold by different companies the 

 samples have been credited to only one company. Thus oil sold by 

 the North Carolina Oil Company is credited to The Texas Company, 

 and oil shipped by the Gulf Refining Company is credited to the 

 Cape Fear Oil Company. 



