then by the mountains themselves and most importantly by winter snowstorms. Consequently, the Central Pacific expanded its efforts to hire immigrant laborers (many of whom were Chinese). The immigrants seemed to be more willing to tolerate the horrible conditions, and progress continued. The increasing necessity for tunneling then began to slow progress of the line yet again. To combat this, Central Pacific began to use the newly invented and very unstable nitro-glycerine explosives—which accelerated both the rate of construction and the mortality of the Chinese laborers. Appalled by the losses, the Central Pacific began to use less volatile explosives, and developed a method of placing the explosives in which the Chinese blasters worked from large suspended baskets that were rapidly pulled to safety after the fuses were lit. The well organized Chinese teams still turned out to be highly industrious and exceedingly efficient; at the peak of the construction work, shortly before completion of the railroad, more than 11,000 Chinese were involved with the project. Although the white European workers had higher wages and better working conditions, their share of the workforce was never more than 10%. As the Chinese railroad workers lived and worked tirelessly, they also managed the finances associated with their employment, and Central Pacific officials responsible for employing the Chinese, even those at first opposed to the hiring policy, came to appreciate the cleanliness and reliability of this group of laborers. After 1869, the Southern Pacific Railroad and Northwestern Pacific Railroad led the expansion of the railway network further into the American West, and many of the Chinese who had built the transcontinental railroad remained active in building the railways. After several projects were completed, many of the Chinese workers relocated and looked for employment elsewhere, such as in farming, manufacturing firms, garment industries, and paper mills. However, widespread anti-Chinese discrimination and violence from whites, including riots and murders, drove many into self-employment. Agriculture Up until the middle of the 19th century, wheat was the primary crop grown in California. The favorable climate allowed the beginning of the intensive cultivation of certain fruits, vegetables and flowers. In the East Coast of the United States a strong demand for these products existed. However, the supply of these markets became possible only with the completion of the transcontinental railroad. Just as with the railway construction, there was a dire manpower shortage in the expanding Californian agriculture sector, so