202 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



claims the tourmaline to be the most interesting of all the 

 gems, when we come to consider the beauty and diversity of 

 its color, the complexity of its composition, and the wonders 

 of its physical properties. When the mineral equals the blue 

 and red sapphire, the emerald, or the topaz in color, he con- 

 siders it equal in value to either of the above gems, and this 

 view is supported by the eminent Professor Beudant, of Paris. 



GEOLOGICAL SURVEY OF CANADA FOE 187l-'72. 



Professor Selwyn, director of the Geological Survey of 

 Canada, has just published a report of the progress of that 

 useful work during the year 1871-72. This is largely occu- 

 pied by an account of a geological reconnoissance in British 

 Columbia made by direction of the Canadian government. 

 The expedition was well provided with scientific assistants, 

 and accompanied by a photographer, and in the preliminary 

 report embraced in the present volume will be found some 

 interesting details. Special attention was paid to the gold 

 deposits, as also to the coal-beds, both on the main-land and 

 on Vancouver Island. 



The survey has experienced a severe loss in the removal 

 of Professor T. Sterry Hunt, one of the earliest and most effi- 

 cient members, to Boston, where he has taken charge of the 

 chair formerly held by Professor William B. Rogers in the 

 Institute of Technology. 



THIRD AND FOURTH ANNUAL REPORT OF THE GEOLOGICAL 

 SURVEY OF INDIANA FOR 1871, 1872. 



The third and fourth annual report of the Geological Sur- 

 vey of the State of Indiana for the years 1871 and 1872 has 

 just been published by Professor E. T. Cox, State Geologist, 

 and, like its predecessors, consists of a neat, compact volume, 

 with an accompanying atlas of geological maps. The report 

 opens with a general statement on the j^art of the director of 

 the more interesting features of the geology of the entire 

 state, especially as to the location and working of coal veins. 

 This interest is of great importance in Indiana ; and its rapid 

 extension within a few years past, according to Professor Cox, 

 may be traced largely to the discoveries and suggestions of 

 the State Survey. 



Reports of detailed explorations of several counties, as 



