传硕公版书
◎达仁堂的死算盘
普通商店所用计核银钱的算盘，大都是活动的，可以移来移去，只有南京路望平街口乐家老铺京都达仁堂药店所用算盘，系嵌入柜台上面不能移动的，此可谓特别算盘了。该店由北平分此，据说那边商家都用此种死算盘。作者虽曾两次北上，惜匆促间未曾留意，是否如此，还待证实。
上海鳞爪 · 郁慕侠 · Chapter 179 of 353
◎达仁堂的死算盘
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