Apparatus Named “Shimo-bako” to Produce a Lot of Frost

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  • 霜の製造装置 “霜箱” の作製
  • シモ ノ セイゾウ ソウチ シモバコ ノ サクセイ

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Abstract

In the seasons when natural fresh snow is unvailable, it is necessary to produce fresh srow artificially in order to carry out the experiments on freshly fallen snow. However, it is difficult to produce a lot of snow crystals at a time, and the author thought of making use of frost instead of fresh snow and fabricated the apparatus named “Shimo-bako” No. 1 & 2, which could produce a large amount of frost in a cold room. The name “Shimo-bako” literally means “Frost-box” in Japanese, as “Shimo” means frost and “bako” which is assimilated form “hako” means box in Japanese.<BR>Each apparatus of the “Shimo-bako” consists of one (for No. 1) or two (for No. 2) evaporators, one (for No. 1) or four (for No. 2) blowers, hemp strings and a drawer.<BR>Frost as much as 3. 5kg was produced in one day by Shimo-bako No. 1 (density of the frost : 0.04g. cm-3, fernlike crystal) and 12. 3kg by Shimo-bako No. 2 (density of the frost : 0.03g.cm-3, fernlike crystal).

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