NOVE.MBEE 1, 1895.] 



^SCIENCE. 



599 



and the crystalline schists. This is followed by 

 an account of the effects of dynamic metamor- 

 phism upon the minerals and structures of 

 rocks. Very little space is devoted to the petro- 

 graphical description of the various kinds of 

 crystalline schists, which are grouped under 

 the heads of crystalline schists, gneisses, granu- 

 lites and eclogites. The basis of classification is 

 structure. The book shows careful preparation, 

 and although the reviewer has taken exception 

 to some features of it he would recommend it to 

 all those beginning the study of petrology. 



Joseph P. Iddings. 



SCIENTIFIC JOURNALS. 



THE AMERICAN JOURNAL OF SCIENCE, 



NOVEMBER. 



The November number of the American 

 Journal of Science opens with an article by A. 

 De Forest Palmer, Jr., of Brown University, 

 giving the results of measurements made at 

 Baltimore in 1893 upon the D3 helium line in 

 the solar spectrum. The observations were 

 made with a large telescope spectrometer with 

 a plane speculum metal grating, the line in 

 question being compared with the best standard 

 lines in the field of view. Seventeen series of 

 measurements were made, an equal number of 

 observations being made on opposite points of 

 the sun's limb to eliminate the effect of rota- 

 tion. The average of the seventeen values ob- 

 tained was 5875.939 ± .006. A paper by E. 

 A. Hill discusses the new elements argon and 

 helium with special reference to the q[uestion as 

 to the atomicity of argon. It is argued that 

 the observations thus far made are not conclu- 

 sive as proving that it is monatomic ; some sug- 

 gestions are also made as to the relations be- 

 •tween the elements named and other elements 

 as shown in the periodic classification of Men- 

 deleeflf. Professor W. LeConte Stevens gives 

 the remainder of his address delivered before 

 Section B of the American Association upon 

 ' Recent Progress in Optics ; ' the earlier part was 

 published in the October number. Wells and 

 Hurlburt describe a series of ammonium-cu- 

 prous double halogen salts. Other chemical 

 articles are by Gooch and Evans upon the re- 

 duction of selenic acid by hydrochloric acid, 

 and by Gooch and Scoville upon its reduction 



by potassium bromide in acid solution. L. V. 

 Pirsson describes some phonolitic rocks from 

 the neighborhood of the Bear Paw Mountain in 

 Montana ; one of these contained large crystals 

 of pseudo-leucite, resembling those of Brazil 

 and Magnet Cove, Arkansas. S. L. Penfield 

 and J. H. Pratt give thfe results of an investiga- 

 tion of a series of minerals of the triphylite- 

 lithiophilite group (Fe, Mn)LiP04, which show 

 that the replacement of iron by manganese has 

 a remarkable influence upon the optical proper- 

 ties. Two articles are given by O. C. Marsh, 

 the first upon the Reptilia of Baptanodon Beds 

 of the Rocky Mountain Jurassic ; the second 

 upon the restoration of some European Dino- 

 saurs. Four plates accompany the latter paper, 

 giving restoration of the genera : Compsognathus, 

 Scelidosaurus, Hypsilophodon, Iguanodon. This 

 paper was read before Section C of the British 

 Association at the Ipswich meeting in Septem- 

 ber last. The concluding twenty pages of the 

 number are devoted to abstracts, book notices, 

 etc. , in various departments of science. 



AMERICAN CHEMICAL JOURNAL, OCTOBER. 



This number of the Journal contains contribu- 

 tions from several laboratories and reviews of 

 new books on chemistry. Two papers by White 

 and Jones on the Sulphonphthaleins contain re- 

 sults of work carried on in the laboratory of the 

 Johns Hopkins University on this class of com- 

 pounds. Four articles containing results of 

 work in this line have already appeared. 

 White prepared bromine and chlorine prod- 

 ucts of sulphonfluorescein, but found that the 

 sulphonfluorescein itself could not be pre- 

 pared by the action of resorcinol on orthosul- 

 phobenzoic acid, the product in this case con- 

 taining four or six residues of resorcinol in- 

 stead of two. Jones obtained similar results 

 using the paramethylsulphonphthalein. Jack- 

 son and Grindley contribute the first of a series 

 of papers upon the action of sodic alcoholates 

 on chloranil. A number of substances were 

 made belonging to a class which had not been 

 very thoroughly investigated before and to 

 which the authors give the name hemiaeetals. 

 The discovery of the hemiaeetals of the qui- 

 nones has led them to suggest a possible expla- 

 nation of the constitution of quinhydrone and 



