these are the ideas in an era when people lived without refrigerators . いずれも冷蔵庫の無い時代の工夫であった。
even compared to national wage levels in an era when the status difference between social classes was very large , such a salary was extremely high . これは身分格差が著しい当時の国内賃金水準からしても極めて高額であった。
as described above , in an era when wood prices in japan were high and firewood and charcoal were the main sources of thermal energy , it was naturally considered that income could be gained by selling forest resources , such as charcoal , in addition to wood cut in the field practice forest of a university . 前述のように、国内の木材価格が高く、薪炭が熱エネルギーの中心だった時期においては、大学演習林において伐採した材木のほか木炭などの林産資源を売ることで収益を上げることは当然とされている。
as described above , in an era when wood prices in japan were high and firewood and charcoal were the main sources of thermal energy , it was naturally considered that income could be gained by selling forest resources , such as charcoal , in addition to wood cut in the field practice forest of a university . 前述のように、国内の木材価格が高く、薪炭が熱エネルギーの中心だった時期においては、大学演習林において伐採した材木のほか木炭などの林産資源を売ることで収益を上げることは当然とされている。