34 
The following table shows the growth of the industry in the 
United States between 1921 and 1927 ;— 
Year. 
The industry as a whole : 
1921 ... vee ss 
1923 ... _ ves 
1925 ... ee er 
1927 ... - ee 
Tyres and Inner Tubes : 
1921 ... vee vee 
1923 ... ave I. 
19256 ... ve vee 
1927 ... ath ee 
Boots and Shoes : 
1921 ... ve. vee 
1923 ... we vee 
1925 ... an w 
1927 ... www 
Other rubber manu- 
factures : 
1921 ... ee 
1923 ... oo ee 
1925 ... a5 - 
1927 ... . 
Hatablish- 
ments. 
196° 
529 
530 
516 
178 
160 
[26 
L09 
24 
25 
23 
29 
204 
344 
381 
25 
Wage 
Harpers 
(average 
number). 
103,273 
137,868 
141,869 
141,997 
55,496 
13,963 
31,640 
78.9568 
23,888 
29,435 
24,999 
26.848 
23,889 
34,470 
35,230 
36.803 
Primary 
Horse 
Power. 
505,634 
556,691 
790.629 
370,551 
103,227 
451.724. 
56,184 
59,413 
58.350 
£78,899 
194,051 
270.539 
Wages. | Cost of 
ges. Materials. 
£000. 
25,400 
37,460 
39,180 
40.700 
£000. 
77,870 
103,050 
147,750 
135,700 
15,420 
22,350 
24,800 
24.650 
60,000 
75,100 
115,000 
104.200 
4,820 
3,930 
5,770 
6,600 
6,600 
9,300 
8,350 
2.900 
5,160 
8,180 
8,610 
0.420 
11,270 
18,650 
24,400 
24.190 
Value of 
Product. 
£000. 
144,950 
196,900 
257,950 
252,000 
102,000 
132,200 
190,000 
178.500 
19,350 
27,100 
23,850 
25.600 
23,600 
37,600 
44,100 
47.500 
* Not recorded in the 1921 census. 
Production. ~~ 88. The value of rubber products in 1923 was thus 36 per cent. 
greater than in 1921; in 1925 it had increased by another 31 per 
cent. over 1923, chiefly as the result of the increase of £44,700,000 
in the cost of materials. In the rubber tyre branch of the industry 
the value of the products in 1925 was £190,000,000, an increase of 
about 44 per cent. over the value in 1923. The decline in the 
number of establishments in the tyre branch, from 160 in 1993 
to 109 in 1927, indicates the tendency towards centralisation of the 
iyre industry. There was also a decline in the number of estab- 
lishments in the rubber boot and shoe branch, while for other 
rubber products the number showed an increase. 
89. The total value of the output of the rubber industry in 1927 
was slightly less than that for 1925, although greater than that 
for 1923. Reductions in tyre prices were responsible for this 
decline. The value of the output of boots and shoes, in 1927 , Was 
higher than that for 1925 although less than that for 1923. For 
other kinds of rubber manufactures the value in 1927 wag higher 
than in previous census vear.