84 Scientific Intelligence. 



Si0 2 MnO FeO CaO MgO H 2 (cryst.) H 2 (const.) 

 G. = 2-965 44-89 36-53 2*48 8-24 tr. 5-99 2-21 = 100-34 



From this, the composition H 2 (Mn, Ca) fi Si 6 ]9 + 3H„0 is deduced, 

 which varies somewhat widely from the results hitherto obtained. 



Caledonite in distinct crystals is noted from the Stevenson- 

 Bennett mine, Organ Mountains, New Mexico ; also gay-lussite 

 from Sweet Water Valley, Wyoming. The use of dolomite as 

 money by the Indians in Lake Count} r , California, is noted. The 

 tokens are shaped in cylindrical forms and burned, which brings 

 out reddish streaks in the oxidation of the iron, and then polished 

 and perforated. In this form they are highly valued by the 

 natives. 



The various types of the beautiful Joplin crystals of calcite 

 from Joplin are described and well figured. The observations 

 form an important addition to the literature of the species. 



V. labellen zur Hestimmung der Miner alien mittels dusserer 

 Kennzeichen. Herausgegeben von Dr. Albin Weisbach. Ftinfte 

 Auflage. Pp. 106. Leipzig, 1900 (Arthur Felix). — The Deter- 

 minative Tables of Prof. Weisbach, first issued in 1866, are so 

 well known by those interested in mineralogy that their value 

 hardly needs to be remarked upon here. Based upon external 

 characters alone, they give the student a simple means of deter- 

 mining species, applicable in ordinary cases, and teach him to use 

 his powers of observation with accuracy and discrimination. 



8. JRepertorium der Miner alogischen tend ICrystallographischen 

 Xiiteratur vom Anfang d. J. 1891 bis Anfang d. J. 1897, und 

 Generalregister der Zeitschrift fur Krystallo graphic und Mine- 

 ralogie, Band xxi-xxx. Herausgegeben und bearbeitet von E. 

 Weinschenk und F. Grtjnling. II. Theil (Generalregister von 

 F. Grinding). Pp. 394. Leipzig, 1900 (Wilhelm Engelmann). — 

 The First Part of this Index has already been noticed in the 

 present volume of this Journal (p. 229). Part II, now issued, 

 completes the work, which is invaluable for every one interested 

 in the progress of Mineralogy. The fact that this general index 

 extends to nearly four hundred pages shows strikingly the 

 immense amount of material in the Zeitschrift to which references 

 are made. 



III. Botany and Zoology. 



1. Les Carex de PAsie orientate y by A. Frajstchet, Nouv. 

 archiv. du museum d'hist. nat., Ser. 3, vols. 8-10, Paris, 1896- 

 1898. — The present comprehensive work deals with the vegeta- 

 tion of Carex in eastern Asia, of which 274 species are described 

 and a number of new ones are figured ; the geographical distri- 

 bution is given to each species. Inasmuch as the number of 

 species of Carex is in the neighborhood of some 800, the author 

 has rendered excellent service to the study of the genus by pre- 

 senting figures of the new with their general habit and other 

 details. Eastern Asia, and especially Japan, appears to be ex- 



