Reviews 



Experimental Investigation of the Formatio?i of Mi?ierals i?i an Igne- 

 ous Magma. 1 - A review. 



Professor Morozewicz has at length published in German the results 

 of five years' elaborate experimentation on the synthesis of minerals 

 and of volcanic rocks. This work is the most exhaustive of its kind 

 since Fouque and Levy's epoch-making experiments, published in 

 Paris in 1882. The wide scope and large scale of the experiments of 

 Morozewicz, and the very complete chemical investigation of his 

 products, together with carefully devised reference to the geological 

 application, make this new work worthy of extended review and of 

 careful study by geologists. 



The motive of the experimenter was primarily to imitate, as nearly 

 as possible, natural igneous magmas, and by fusion of carefully pre- 

 pared chemical mixtures in a large glass furnace to produce crystalline 

 masses in sufficient volume for isolation and chemical investigation of 

 the component artificial minerals. The author lays stress upon the 

 importance of more careful work in the chemistry of the silicates in 

 mineralogy, and the chemistry of silicate mixtures or solutions in 

 petrography. For the former the work of Lemberg and Thugutt is 

 quoted as of primary importance, and for the latter Lagorio and Vogt 

 have initiated methods of research that should be emulated for more 

 complete understanding of the nature of igneous rocks. The work of 

 Fouque and M. Levy was limited to microscopic investigation of the 

 products of fusion in small platinum crucibles in the Fourquignon fur- 

 nace. Morozewicz obtained the use of a corner in a large Siemens 

 furnace, in a glass factory near Warsaw ; the interior of this furnace is 

 much of the time at white heat and continuously so for periods of weeks 

 and months. The furnace is heated by a blast of carbonic monoxide 

 mixed with air, and the temperature to which the crucibles were sub- 



1 Josef Morozewicz (Warsaw). Experimentelle Untresuchungen iiber die 

 Bildung der Minerale im Magma. Tschermak's Mineralog. u. Petrogr. Mittheilun- 

 gen, Bd. XVIII, H. 1-2-3, PP- I_ 9° an< i 105-240, 8 Plates, 1898. 



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