PUBLICA TIONS: eer 
5. Variolitic specimen from Amtensee, Grythyttau, Orebr6, Sweden 
(new locality). 
A careful petrographic description is given, but the material was 
insufficient for a study of its genesis. = 
6. “Pudding granite” from Craftsbury, Vermont. 
“This is a biotite-muscovite-granite which contains concretions of 
biotite that are quite uniform in size and usually about an inch and a 
half in diameter. ‘They are spherical or spheroidal in form and cor- 
rugated on the surface.”’* 
Here Chrustschoff considers that the development of the variole 
falls into the period of the development of the mica in the host and 
the spheroids appear to be developed through the local increase of a 
character inherent in the entire mass; in the variole the quartz-feld- 
spar complex is surrounded by a zone of mica broader and thicker 
than in the homogeneous rock. The whole phenomenon is considered 
as the result of concretionary action. 
7. Feldspathic variole from Aldersback, Sweden (new locality). 
The sum of the observations indicates that this variole is a resorp- 
tion residue of a holocrystalline, macrovariolitic rock. 
8. Variolitic quartz-diorite from Svartdal, Norway. 
Here the ores and apatite balled into a glomero-porphyritic mass 
served as a center of crystallization so that the rock is “consequently 
determined as an original macrovariolitic quartz-mica-dioritic, whose 
spherulitic form of structure is autogenetic and due to the constitution, 
as well as to the mode of solidification, of the magma.” P. 177. 
g. Variolitic gabbro from Romsas, Askim, Norway. 
The varioles were local developments along the sides of a laccolitic 
mass and were mechanically disseminated, locally, through the mass. 
The varioles crystallized under intratelluric conditions and subse- 
quently had formed about them a rim of amphibole. 
1o. Variolitic amphibole-granite from Slattmossa, Sweden.’ 
Here the core is more basic than the mother rock, and we thus con- 
clude that it is an old basic secretion around which have been formed 
shells of intermediate acidity. This rock, consequently, is not an orig- 
inal macrovariolite, but is the product of an early secretion of basic 
material. 
The above résumé of the results and conclusions reached shows 
that macrovariolitic rocks belong genetically to at least four classes : 
‘Hawes, Lithology and Mineralogy of New Hampshire, Vol. II., Part IV., p. 203. 
2 Hoist, Geol. Foren., Stockholm, Forhandlung, Bd. VII., p. 135. 
