1902] Ami Reviews. 167 



graphy ; periodicals, reports of institutions, societies, congresses, 

 etc. General treatises, text books, dictionaries, bibliog-raphies, 

 tables, addresses, lectures, paedagogy, institutions, museums, 

 collections, economics and nomenclature. Then follow works on 

 the various sub-divisions relating to External Morphology and 

 Organography (including teratology). Anatomy, Development, 

 and Cytology, Physiology, Evolution, Taxonomy, and Geo- 

 graphic Distribution. Besides general works on Taxonomy 

 entries are made on the following lines, including Dicotyledons, 

 Monocotyledons, Gymnosperms, Vascular cryptogams, Mosses 

 and Hepaticae, Characeae, Algae and Schizophyceae, Lichens, 

 Fungi, Bacteria and Mycetozoa Also plants of which the pos- 

 ition is not ascertained by the slip-maker. No index accompanies 

 this Part i of the Botanical Catalogue, but a long and useful list 

 of Journals relating to Botany is added on pages 367-368. 



H. M. Ami. 

 Geological Survey of Canada, 



Ottawa, October 25th, 1902. 



"A Petrographical Contribution to the Geology of the 

 Eastern Townships of the Province of Quebec," by 

 John A. Dresser, M A., Principal of St. Francis College, 

 Richmond, Que. Amer. Journ. Sc, 4th Series, Vol. xiii, 

 No. 79, pp. 43-48, July, 1902. New Haven, Conn. 

 This interesting and timely contribution to the geology of the 

 much disputed region of the Eastern Townships of the Province 

 of Quebec, is accompanied by a sketch-map of that part of the 

 Townships where the three belts of supposed Pre-Cambrian rocks 

 occur. It is gratifying to see the excellent results obtained from 

 the petrographical examination of the igneous rocks which make 

 up these belts as given by Mr. Dresser. These rocks have been 

 variously described as altered sedimentaries, or referred to Pre- 

 Cambrian eruptives. 



The Sutton Mountain and the Ascot or Stoke Mountain belts 

 are the two more important of these, and the rocks which make 

 up these hills are described by Dresser in a manner which shows 

 conclusively that we have there well-defined altered igneous rocks. 

 ''Quartz-porphyry" and "granite-porphyry" are recorded from 



