（解説文要約）
小ヤマでは昭和戦後も、入口は別々でも浴槽は一つの混浴でした。
炭坑の風呂水は、坑内揚水を使っているので、もともと油が混じった上に、
坑内で真っ黒になった者がかけ湯もせずに飛び込みます。
さらには浴槽で石鹸を使うので、最後は汚いお湯になりました。
冬になると風呂に入る者はお湯が熱いから水でうめろといい、
入った者はぬるいから沸かせと言い、温度の調節でいざこざがあったようです。
In the old days, men and women would bathe together.
Even in the postwar era, at smaller coal mines, the entrance for men and women was divided, but they shared the same bath in the end.
Bath water containing oil was pumped up from the pit. Moreover, miners jumped into the tub without rinsing the coal off of their skin, using soap in the water.
By the end of the day, the water became nasty.
In winter, some added cold water to cool down the tub, and others demanded that they heat it up.
They were always arguing about the bath water temperature.