MABERY. — COMPOSITION OF PETROLEUM. 295 



lated from these values is 0.000576. A Carius determination gave the 

 required percentage of chlorine. 



0.1536 grm. of the oil gave 0.0923 grm. silver chloride. 



Calculated for C 15 H M C1. Found. 



14.51 14.85 



A determination of the molecular weight supported the same formula. 

 0.9073 grm. of the oil and 18.93 gnus, benzol gave a depression of 0°.984. 



Calculated for C lB H M Cl. Found. 



239 244.5 



The index of refraction was 1.493, and the molecular refraction, 72.90; 

 calculated for C 15 H 29 C1, 73.97. 



Attempts will be made to form the chlorides of the higher hydro- 

 carbons in connection with the study of the composition of these 

 bodies. 



No. 37. —ON THE COMPOSITION OF JAPANESE PETROLEUM. 



By Charles F. Mabery and Shinichi Takano.* 



The oil fields in Japan are the most promising and are under the most 

 rapid development of any recently discovered oil territory. The output 

 in 1891 was 56,000 bbls. annually; in 1899 it was 1,000,000 bbls. 

 The oil territory in Japan is contained in the province of Echigo, at 

 least to the extent of 90 per cent, on the northern coast of the Sea of 

 Japan. This province is surrounded in part by a mountain chain which 



* Mr. Takano has spent three years in the study of petroleum in this country, 

 having been sent for this purpose by the Japanese Government. He is thoroughly 

 familiar with the geology of the oil territory in Japan, having given especial at- 

 tention to this subject in a thesis which he presented for a degree in the University 

 of Tokio. Besides a thorough knowledge of the composition of petroleum from a 

 chemical point of view, which he has gained during the two years he has spent 

 exclusively in the study of this subject in this Laboratory, Mr. Takano spent one 

 year as a laborer in different refineries, where he took charge by actual manipula- 

 tion of every process in the preparation of commercial products. The work pre- 

 sented in this paper formed the subject of a thesis by Mr. Takano for the degree 

 of M.S. 



