104 Scientific Intelligence. 



from the Volcano Observatory on the borders of Kilauea. Nos. 

 1 to 20 of volume II, of dates January 7 to May 20, 1914, have 

 recently been received. The bulletin is in charge of Professor 

 Howard M. Ballou as editor. These notes, first published in the 

 Pacific Commercial Advertiser of Honolulu, give a most inter- 

 esting and useful record of the constantly changing conditions, 

 particularly at Kilauea, and will have therefore a permanent 

 value to all volcanologists and seismologists. 



11. Simple Directions for the Determination of the Common 

 Minerals and Rocks. A Laboratory Course in General Geology ; 

 by William H. Hobbs. Pp. vii, 31. New York, 1914 (The 

 Macmillan Co.). — This pamphlet, a reprint of matter from the 

 author's "Earth Features and their Meaning," will be found use- 

 ful by many teachers and students. 



12. The Minerals of the Black Hills ; by Victor Zikgler. 

 Pp. 250; 31 pis. and * 73 figs. South Dakota School of Mines. 

 Bulletin No. 10. Department of Geology and Mineralogy. 

 Rapid City, February, 1914. — The Black Hills region has been so 

 rich in its mineral products, both as regards the variety and the 

 economic importance of its species, that this record of Professor 

 Ziegler will be welcomed by all interested in mineralogy. The 

 opening forty pages are given to a general account of minerals 

 for the local reader, and then follows a description of the indi- 

 vidual species arranged according to the usual classification. 

 Much interesting matter is contained here, and the value of the 

 publication is largely increased through the twenty-seven half- 

 tone plates of typical minerals, which are reproduced with an 

 unusual degree of success. There is also a general map of the 

 Black Hills and a special map of the Harney Peak region, show- 

 ing the many important localities of tin and tungsten, also lith- 

 ium ; further, bismuth, mica, and barite. 



13. Kristallberechnung und Kristallzeichnung ; by B. Gossxer. 

 Pp. vii, 128 ; 109 text-figures with 1 plate. Leipzig, 1914 (Wil- 

 helm Engelmann). — This book gives, with the aid of many figures, 

 a clear and concise account of the various methods of projection 

 and calculation in common use by crystallographers. In addition 

 it explains the different methods for drawing crystal figures. It 

 should prove a valuable text-book for students of crystallography, 

 as well as a convenient reference book for those engaged in crys- 

 tallographic investigations. w. e. ford. 



III. Botany and Zoology. 



1. The Weed Flora of Iowa ; by L. H. Pammel and five col- 

 laborators. Pp. xiii, 912 ; 564 text figs. Iowa Geological Sur- 

 vey, Bull. No. 4. Des Moines, 1913.— This elaborate work was 

 undertaken in the hope that the immense damage done by weeds 

 in Iowa might be diminished if farmers had accessible informa- 

 tion about these destructive plants. The first chapter, a descrip- 



