It is worthy remark, that frequently when we break one vesicle, we meet with another v/ithin it, and concentrical.    From Wordnik.com.  [A General collection of the best and most interesting voyages and travels in all parts of the world [microform] : many of which are now first translated into English : digested on a new plan] Reference

Aristotle's wheel paradox: Rolling joined concentrical wheels seem to trace the same difference with their circumferences, even though the circumferences are different.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Strongly attracted by scientific and mathematical research, in the 1970s she experimented with engravings in copper and white metal, in which dynamical systems of curves, Archimedes’s spirals and wide or concentrical spaces alternate.    From Wordnik.com.  [Paola Levi-Montalcini.] Reference