Barnett L
Mich Hist Rev. 1997 Fall;23(2):169-87.
Although no more than a few dozen mineral wells and springs existed in Michigan at any one time, since their discovery over 125 years ago nearly two hundred firms have operated watering places for the suffering in this state. The publications produced by this industry were collectively quite numerous, but scarcely a hundred or so examples of this genre can be located today. On those rare occasions when materials of this nature can be found in out-of-print book stores or antiquarian dealers'catalogs, it is not uncommon for the asking price to approach $100 per piece. Now that this union list has revealed how scarce and valuable these publication are, persons and institutions possessing such items should take precautions to ensure the security of their holdings.
尽管密歇根州在任何时候都只有几十口矿泉井和泉水，但自125多年前被发现以来，已有近200家公司为该州的患者经营疗养地。这个行业出版的刊物数量相当多，但如今能找到的这类刊物不超过一百份左右。在那些极少数情况下，当这类性质的资料能在绝版书店或古旧书商的目录中找到时，每件的要价接近100美元并不罕见。既然这份联合目录已经揭示了这些出版物是多么稀缺和珍贵，拥有此类物品的个人和机构应该采取预防措施以确保其藏品的安全。
