8 9 i] 



Tables of Reference 



TOTAL NUMBER OF PERSONS, TEN YEARS OP AGE AND 

 OVER, IN THE SEVERAL OCCUPATION CLASSES IN 

 1870, 1880, 1890, AND 1900 CLASSIFICATION OF THE 

 TWELFTH CENSUS 1 



!The data for the years 1890 and 1900 are taken from the Report of 

 the Twelfth Census, Population II, pp. cxxxv-cxxxvi. 



The data for the years 1870 and 1880 are derived from the Report 

 of the Eleventh Census, Population II, pp. cix-cx. Corrections being 

 made as indicated in the Report of the Twelfth Census, Population 

 II, p. cxxvii. The correction is complete except in the case of 

 " Officials of Mining and Quarrying Companies " for the year 1880. 

 These were not separately reported in that year and hence correction 

 was impossible as to them. 



