Fossils And Ultrasonics
Fossils And Ultrasonics OLD FOSSILS CAN BE DIFFICULT was, 60 years ago, the headline on an ad in Electronics Weekly’s issue of January 25th 1961. The ad continues: This isn’t normally a problem page but today we have a question for anyone who may have swerved across to us from the editorial columns. It is this. How would you clean a fossil? Imagine it to be a particularly valuable fossil, so delicate that you don’t care to handle it without witnesses, so fragile that you worry about old Smith’s heavy breathing as he pores over it. Imagine, also,that it is covered with cxcavation dust ...
Source: electronicsweekly.com