March 1, 1921 



THE INDIA RUBBER WORLD 



411 



1917 1918 1919 1920 



Graph A 

 Tires Consumed Monthly In Millions 



than average monthly totals of the number of tires consumed. 



In the figures given by the United States Bureau of Mines the 



domestic monthly consumption of gasoline is given in gallons. 



10.00 

 9.50 

 900 

 8.50 

 800 

 7 50 

 7 00 

 6.50 

 6.00 

 5.50 



5.00 

 475 

 2 4 50 

 ° 415 

 :± 400 

 5 375 



5.25 

 3 00 

 275 

 250 

 2.15 

 2.00 



1.75 

 1.50 



1.25 



1914 



1915 



1916 1917 



Graph B 



1918 



1919 



1920 



Since these figures include gasoline consumed for all uses a re- 

 duction is necessary to determine that used by passenger cars 

 only. The allowance to cover all other uses has been taken at 20 

 per cent. 



The ratio between tires and gasoline consumed is based on 

 reported official cost data' modified by the statement of the 

 American Automobile Chamber of Commerce that 70 per cent 

 of the cars registered are classifiable as small and 30 per cent 

 as large. The average number of miles per gallon of all cars is 

 thus taken at 17 miles. The average usefulness of a pneumatic 

 tire is taken at SSOO miles. The ratio of worn out tires to gallons 

 of gasoline is thus found to be one to 100. In other words, one 

 per cent of the gallons of gasoline consumed represents the number 

 of tires consumed; thus every 100,000 gallons of gasoline repre- 

 sents 1000 tires. 



In Table I the niontlily domestic consumption of gasoline is 

 given as far as available and the estimated corresponding numbers 

 of tires consumed. It is interesting to note that the method 

 adopted results in a total annual consumption of 34,065,000 tires. 

 This practically agrees with the generally accepted trade view 

 and is not greatly in e.xcess of the figure of Akron experts quoted 

 above. 



Tires consumed monthly from 1917 to 1920, inclusive, are 

 charted in graph A. The similarity in seasonal distribution indi- 

 cated is notable, as well as the rapid growth which parallels the 

 annual increase in vehicle registrations. 



Table II records the ofificial registration of motor cars in the 

 United States for the period from 1913 to 1920, and the figures 

 are charted in Graph B. 



Table II 



REGISTkATION OK MoTOR VEHICLES 



Year • Cars 



1913 1,254,971 



1914 1,711,339 



1915 2,445,664 



1916 3,512,996 



1917 4,983,340 



1918 6.146,617 



1919 7.565.446 



1920 9,295.252 



JAPAN'S RUBBER TR A DE— 1918- 1919 



Imports of crude rubber into Kobe in 1913 totalled 1,439,000 

 pounds, valued $859,000; in 1918 rubber imports increased to 

 9,616,000 pounds, valued $4,110,000, and in 1919, 15,804,000 pounds 

 were imported, valued at $5,866,000. Exports from Kobe in 1918 

 included 2,944,000 pounds of tires, valued $2,019,000, and other 

 rubber manufactures to the value of $366,000; in 1919 tire exports 

 were 4,211,000 pounds, valued $3,089,000, and exports of other 

 rubber manufactures increased to $682,000. Exports of insulated 

 wire totalled 2,225,000 pounds, valued $909,000 in 1919, as against 

 1,892.000 pounds, valued $701,000 in 1918, and 31,000 pounds, 

 valued $9,00(1, in 1913. 



Insulated wire was also exported from Osaka, in the quantity 

 of 4,706,000 pounds, valued $1,188,000, in 1919, as against 2,967,000 

 pounds, valued $958,000, in 1918, and 136,000 pounds, valued 

 $28,000, in 1913. Imports from the United States into Osaka in 

 1919 included 30,000 pounds of soft rubber, valued $20,000, as 

 against 32,000 pounds, valued $32,000, in 1918. Declared exports 

 from Japan to the United States in 1919 included 2,402,694 pounds 

 of crude rubber, valued $1,094,085, and 1,036,802 pounds of sheet 

 rubber, valued $442,790. 



Imports of rubber goods through the port of Trondhejm, 

 Norway, during 1919, were 23 metric tons, as against 25 metric 

 tons in 1913. 



United States Motor Vehicle Registration 1913-1920 

 Inclusive 



^Operating Cost Record of 65 Motor Vehicles in the Los Angeles Water 

 Department. Engineering Reccrd. June 3. 1916. pages 728-732. 



