326 APPENDIX 



powers of manipulating and unravelling difficult 

 structures. After having spent years in studying 

 microscopic slices of Eozoon and the limestones in 

 which it occurs, I have ever felt new astonishment 

 when I saw the manner in which, by various pro- 

 cesses of slicing and etching, and by dexterous 

 management of light, he could bring out the struc- 

 ture of specimens often very imperfect. Not long 

 before Dr. Carpenter's death, I had an opportunity 

 to appreciate this in spending a few days with him 

 in studying his more recently acquired specimens, 

 some of them from my own collections, and dis- 

 cussing the new points which they exhibited, and 

 which unhappily he did not live to publish. Some 

 of these new facts, in so far as they related to speci- 

 mens in our cabinet here, have since that time been 

 noticed in my resnine of the question in the "Memoirs 

 of the Peter Redpath Museum," 1888. 



Those who know Dr. Carpenter's powers of 

 investigation will not be astonished that later 

 observers, without his previous preparation and rare 

 insight, and often with only few and imperfect 

 specimens, should have failed to appreciate his 

 results. One is rather surprised that some of them 

 have ventured to state with so great confidence 



