Age classification of employees and members of their households. CHAPTER IX.-General progress and assimilation: 370 Ownership of homes. 373 School facilities and attendance.. 373 PART III.-THE IRON ORE MINING INDUSTRY IN MICHIGAN. History of immigration to the Gogebic Range.... 402 Period of residence in the United States of foreign-born employees. 408 409 Reasons for employing immigrants...... 409 CHAPTER III.-Economic status: Principal occupation of immigrant employees before coming to the United States... 413 Weekly earnings.. 414 Relation between period of residence and earning ability. CHAPTER IV.-Salient characteristics: PART IV. THE IRON ORE MINING INDUSTRY IN ALABAMA. Period of residence in the United States of foreign-born employees. 435 436 CHAPTER III.-Economic status: Principal occupation of immigrant employees before coming to the United |