METHODS OF PETROGRAPHICAL RESEARCH. 221 



Behrens' manual (12) has furnished English readers with a 

 concise practical guide to microchemical analysis, it is to 

 be expected that this method of investigation will find 

 more favour among petrologists in this country than it has 

 hitherto done. 



BIBLIOGRAPHY. 



(1) Cole, Grenville A. J. On Simple Apparatus for Use in 



the Observation of Flame-Reactions. Geo/. Mag. (3), vol. 

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(2) JOLY, J. On the Determination of the Melting Points of 



Minerals. Part I. — The Uses of the Meldometer. Proc. 

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(3) THURACH, HANS. Ueber das Vorkommen mikroskopischer 



Zirkone und Titanmineralien in den Gesteinen. Verh. 

 phys. medic. Ges. Wiirzburg (N .S.) , vol. xviii., No. 10, 1884. 



(4) Derby, Orville A. On the Occurrence of Monazite as an 



accessory Element in Rocks. Avier. Journ. Sci. (3), vol. 

 xxxvii., pp. 109-113, 1889. 



(5) Dick, Allan B. Notes on a New Form of Polarising Micro- 



scope. 8vo, London, 1890. 



(6) Cohen, E. Zusammenstellung petrographischer Unter- 



suchungsmethoden nebst Angabe der Literatur. Mitth. 

 naturwiss. Ver. Neu-Vorpomm. in Greifsivald, 1890. 



(7) SOLLAS, W. J. On a Method of Separating the Mineral 



Components of a Rock. Nature, vol. xlix., pp. 211-212, 

 1893. 



(8) F0UQ_u£, F. La petrologie en Allemagne. Rev. Scient., No. 



34, 1875. Les applications modernes du microscope a la 

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(9) ZlRKEL, F. Die Einfiihrung des Mikroskops in das mineral- 



ogisch-geologische Studium. 8vo, Leipzig, 1 88 1. 



(10) STELZNER, A. Die Entwickelung der petrographischen 



Untersuchungsmethoden in den letzten fiinfzig Jahren. 

 Festschr. naturzviss. Ges. Isis. Dresden, pp. 25-48, 1885. 



(11) Williams, George Huntington. Modem Petrography, 



an Account of the Application of the Microscope to the Study 

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(12) BEHRENS, H. A Manual of Microchemical Analysis. 8vo, 



London, 1894. 



(13) Dick, Allan B. A New Form of Microscope. M in. Mag., 



vol. viii., pp. 160-163, 1888. 



