Reviews — Heddle's Mineralogy of Scotland. 325 



Naturalists' Club, last December. The material has now been 

 extended, a bibliography added, and the whole published in the 

 American Geologist for May. 



Professor E. W. Hilgard's " Historical Outline of the Geological 

 and Agricultural Survey of the State of Mississippi," which appeared 

 in the publications of the Mississippi Historical Society, has been 

 reprinted in the American Geologist for May. It gives an interesting 

 picture of the origin, rise, and progress of one of the United States 

 Surveys, and provides an official account of the publications, always 

 of value. 



Mr. J. A. Cunningham has published a contribution to the 

 Theory of the Order of Crystallization of Minerals in Igneous 

 Kocks, in the Scientific Proceedings of the Eoyal Dublin Society 

 (1901, vol. ix, pt. 4). The paper should be read in connection with 

 Dr. Joly's paper, " Theory of the Order of Formation of Silicates in 

 Igneous Rocks," published by the same Society in 1900. 



IR :E! "V I E AAT S. 



I. — The Mineralogy op Scotland. By the late M. Forster 

 Heddle, M.D., F.R.S.E. Edited by J. G. Goodchild, F.G.S. 

 2 vols. : 360 pp., 30 figures in text, 117 plates. (Edinburgh: 

 David Douglas, 1901. Price 36s. nett.) 



DURING the greater part of a long life the late Professor Heddle, 

 for many years Professor of Chemistry in the University of 

 St. Andrews, spent his holidays in the mineralogical exploration 

 of his native country, and scarcely a single locality from which 

 there was a likelihood of obtaining good specimens can have been 

 left unvisited by him ; he was thus able to bring together a collection 

 of Scottish minerals remarkable for its completeness and for the 

 excellence of its material ; to its examination, chiefly chemical, he 

 devoted all his available time. Some years ago the collection was 

 purchased for the nation and deposited in the Museum of Science 

 and Art at Edinburgh ; there it was arranged and labelled, for 

 public exhibition, by Dr. Heddle during the latter years of his life. 



Of the topographical and chemical mineralogy of Scotland, 

 Professor Heddle had thus an unsurpassed knowledge, and he made 

 voluminous notes with a view to the eventual publication of 

 a treatise by means of which the information so laboriously acquired 

 might be preserved to posterity. Unfortunately, like too many 

 other investigators, he was called to his rest when his work was 

 still far from complete ; there was thus a great danger that his notes 

 might never be printed and made available for general use. His 

 family has done what was possible to avert the threatened 

 catastrophe, and have obtained help for the completion and editing 

 of the work ; the notes have been prepared for press and the treatise 

 has been edited by Mr. J. G. Goodchild, who is now closely 

 associated with the custody of the collection itself. 



To complete the work, Mr. Alexander Thoms, son-in-law of 



