488 PROCEEDINGS OF PHILADELl^HIA MEETING. 



Cuadro de la mineralogia mexicana coiiteniendo las especies minerales dispiiestas 



por ordeii de su coinposicioii qiiimica y cristalizacioii : Bol. de la Soc. de Geogr. 



y Est., V. X, 1864, pp. 564-571. 

 Descripcion de la maso de hierro meteorieo de Yanlmitlaii y de otras masas de 



liierro meteorieo caidas en territorio mexicano : Bol. de la Soc. de Geogr. y Est., 



V. X, 1864, pp. 661-665. 

 Los criaderos de azufre de Mexico y su explotacion : La Nature, v. 1, i>p. 44-50. 



Mexico, 1869. 

 Serie de fotografias de mannferos del Valle de Mexico y descripcion de los fosiles 



presentados a la Sociedad Geologica Alemana por Bagerich, 1869. 

 Ensaye de oro por un procediniiento calorinietrico : La Xatttre, v. ii, 1871, p. 140. 

 Noticia de la existencia del arzenico nativo en la Repiiblica mexicana. In colab- 



oration with M. Barcena: La Nature, v. ii, 1873, pp. 313, 314. 

 Descripcion del mineral bismutifero del mineral de San Luis Potosi: La Nature, 



V. iii, 1874, pp. 92-94. 

 Noticias sobre los criaderos de grafita y plombagina de Mexico y su explotacion : 



La Nature, v. iii, 1875, pp. 275-281. 

 Catalogue descriptive de meteorites de Mexico. Paris, 1889. 

 Carta geologica de la Repul^lica mexicana: Com. Geol. de Mexico, 1889. 

 Carta minera de la Republica mexicana. Mexico, 1889. 

 Fauna fosil de la sierra de Catorce. San Luis Potosi. A. del Castillo y J. G. Agui- 



lera: Bol. de la Com. Geol. de Mexico, 1895. 



The presentation of scientific papers was declared in order, under the 

 usual rule governing the position of papers in the program. The first 

 and second papers were read by title. 



DISINTEGRATION AND DECOMPOSITION OF DIABASE AT MED FORD, MASSA- 

 CHUSETTS 



BY GEORGE P. MERRILL 



The paper is ])rinted as pages 349-802 of this volume. 



GEOGRAPHIC RELATIONS OF THE GRANITES AND PORPHYRIES IN THE EASTERN 



PART OF THE OZARKS 



BY CIIAULES R. KEYP:S 



The paper is printed as pages 363-o7G of this volume. 

 The next paper was read by the author: 



ILLUSTRATIONS OF THE DYNAMIC METAMORPHISM OF ANORTHOSITES AND 

 RELATED ROCKS IN THE ADIRONDACKS 



BY J. F. KEMP 



\_Ahstract'] 



Essex county. New York, with about 2,500 square miles of area, contains tlie 

 principal portion of the Adirondacks. As field-work has progressed year by year 



