658 KLEIN : CONSTITUTION OF PORCELAIN 



in 1863 3 it was not until 1887 4 that the derivations of the names 

 were fully understood. It was the custom of Dr. Kellogg to ex- 

 press his veneration for Biblical characters and places by nam- 

 ing his botanical discoveries in their honor, just as other writers 

 have sought to commemorate the name of friends or localities 

 intimately associated with their experiences. In this instance 

 it was desired by the author to recall the dwelling place of 

 Abram, by honoring the newly discovered tree with its name. 

 Anticipating perhaps that Moreh might not be recognized as 

 the inspiration of his name, he called the tree "Abram's oak." 

 But notwithstanding his precaution, the name "morehus oak" 

 has appeared in forestry literature as the common name of this 

 interesting tree. 5 This name has no meaning, is grammatically 

 incorrect, and only perpetuates the fact that Dr. Kellogg's name 

 has not been understood. The name "Abram's oak" is some- 

 times used; 6 but on account of the fact that the erroneous name 

 "morehus oak" has been so widely circulated, it seems advis- 

 able to replace it with the correct English equivalent of the 

 scientific name. It is proposed, therefore, that Quercus morehus 

 Kellogg be uniformly designated as Moreh oak. 



CERAMICS. — The constitution and microstructure of porcelain. 1 

 A. A. Klein, Bureau of Standards. (Communicated by 

 S. W. Stratton.) 



A petrographic microscopical study of porcelains prepared in 

 the laboratory of the Bureau of Standards, of commercial por- 

 celain, as well as of various combinations of the raw materials 

 which enter into porcelain, has led to results which are interest- 

 ing and important both scientifically and technically. 



Bodies and mixtures of the following types were examined: 

 kaolin, feldspar-kaolin, feldspar-quartz, and feldspar-clay-quartz. 



3 Proceedings of the California Academy of Science, 2: 36. 1863. 



4 Greene, E. L. Biographical notice of Dr. Albert Kellogg. Pittonia, 1: 

 145. 1887. 



6 Sudworth, G. B. Nomenclature of the arborescent flora of the United Stales. 

 Bull. 14, U. S. Department of Agriculture, Division of Forestry. 1897. 

 6 Britton, N. L. North American Trees, p. 308. 1908. 

 1 To appear in detail as Bureau of Standards Technologic Paper No. 80. 



