10 PROCEEDINGS OF THE ACADEMY OF [1893. 



The deaths of Wm. S. Pine, a member and P. R. Hoy, a cor- 

 respondent, were announced. 



The death on the 3rd inst. of Isaac C. Martindale, the Treasurer 

 of the Academy, having been announced the following minute was 

 adopted : — 



The Academy of Natural Sciences of Philadelphia, in view of 

 the sudden death of Mr. Isaac C. Martindale, its late Treasurer, 

 expresses its profound regret thereat, and records its sense of the 

 great service rendered by him in the faithful, laborious and efficient 

 discharge of his duties as custodian of the Academy's funds. 



As a naturalist Mr. Martindale won the confidence and respect 

 of his fellow Academicians. He was regarded as one of the best 

 analytical botanists in the United States. His knowledge of special 

 American, European and Australian floras was very exact and wide. 

 His herbarium was one of the standard collections of the country, 

 frequently consulted by students of plants and always generously 

 placed at the service of his fellow botanists. 



As an entomologist he had acquired a good knowledge and 

 a valuable collection of Lepidoptera. At his death he was the Vice- 

 President of the American Entomological Society and Ento- 

 mological Section of the Academy. 



Mr. Martindale's relations to his associates were always most 

 pleasant and helpful. His invariable courtesy, willingness to aid 

 his fellow naturalists and his unselfish interest in the advancement 

 of science and especially the prosperity of the Academy are here 

 most cordially recognized and recorded. 



Metamorphism of Sedimentary Rocks. — Mr. Jos. Willcox stated 

 that he had observed an example of the metamorphism of sedi- 

 mentary deposits into crystalline rocks on an island in Pudeau Lake, 

 Canada, about 40 miles north of Alexandria Bay. At this locality 

 the Laurentiau granite is covered by gneiss rocks which in some 

 cases appear like a coarse granite containing cleavable feldspar as 

 large as an egg. The sedimentary origin of these gneiss rocks is 

 indicated by many enclosed, smooth, round quartz pebbles some of 

 which are more than two inches in diameter. 



January 10. 

 The President, General Isaac J. Wistar, in the chair. 

 Forty persons present. 

 Papers under the following titles were presented for publication : — 



