Excerpt from Mechanical Refrigeration for Domestic Use
Mechanical refrigeration, or the artificial production of cold is a development of the nineteenth century. Many methods have been tested out and only a few have survived. Some were discarded because of the inadequacy of apparatus, while others were proven commercially impracticable.
The trend of development has been toward large production and larger units. Many of these large machines are giving very satisfactory service in producing ice to compete with natural ice, or in the refrigerating of storage buildings and manufacturing processes. Many processes have been made practicable by mechanical refrigeration, that were impossible when natural ice was the only available cooling agent.
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