PLATE XII. 
Fig. 1. Spherulitie structure in red felsite-porphyry (apobsidian) from the 
Hammond River below Upham, N. B. This section shows under 
higher magnification well preserved trichites throughout both the 
spherulitic and non-spherulitic parts of the rock (See Fig. 1, p 199). 
Spec. 664. Magnified 37 diameters. 
Fic. 2. Red felsite-porphyry (trachyte), showing feldspar in three genera- 
tions ; large phenocrysts, small rod-like crystals and small grains 
not well bounded. The glassy material has been changed to 
micro-felsite. The only other minerals are magnetite and second- 
ary limonite replacing in part one of the orthoclase phenocrysts. 
Spec. 575. > 42 diam. 
