Most of the manual laborers on the Central Pacific were new arrivals from China. Kraus shows how these men lived and worked, and how they managed their money. He concludes that senior officials quickly realized the high degree of cleanliness and reliability of the Chinese. The Central Pacific employed over 12,000 Chinese workers, 90% of its manual workforce. Ong explores whether or not the Chinese Railroad Workers were exploited by the railroad, with whites in better positions. He finds the railroad set different wage rates for whites and Chinese and used the latter in the more menial and dangerous jobs, such as the handling and the pouring of nitroglycerin. However the railroad also provided camps and food the Chinese wanted and protected the Chinese workers from threats from whites.