74 Scientific Intelligence. 



of great value, and Prof. Percy F. Kendall has added an appen- 

 dix ably supplementing the observations and inferences of Pro- 

 fessor Lewis. But the main work is still that of Lewis in which 

 we are permitted to travel with him over almost the whole of 

 Great Britain and Ireland and see what he saw of the glacial facts 

 upon which his theories were based. Professor Lewis' eye was 

 both sensitive and highly trained, and he records fully the separate 

 facts as they are. In this respect the volume very much resem- 

 bles the separate volumes of the Second Geological Survey of 

 Pennsylvania, and reflects the good judgment of Professor Lesley 

 who furnished the pattern for the reports of the Pennsylvania 

 geologists in whose company Professor Lewis began his scientific 

 work. The volume contains ten elaborate maps and one hundred 

 or more illustrations. The author's minute acquaintance with 

 the glacial phenomena of Pennsylvania enabled him through com- 

 parison to see the meaning of the English facts as no local ob- 

 servers had been able to do. He was led to believe in the con- 

 tinuity of the glacial period and to reject the theory of an exten- 

 sive submergence of the British Isles in connection with it. His 

 greatest triumph is what may be called a reasonably complete 

 demonstration that the high-level shell-beds at Macclesfield and 

 Moel Tryfaen were-not deposited during a period of submergence, 

 but consisted of material which had been incorporated into the 

 till, pushed up by the glacier from the Irish Sea. The work of 

 Professor Lewis marks an epoch in English glacial geology, and 

 Alfred Russel Wallace has recently given his adhesion to the 

 most important of the revolutionary views so ably defended in 

 this volume. Great credit is due to Mrs. Lewis for the expense 

 and pains which she has bestowed in making the unrivalled work 

 of her husband available to the scientific public. g. f. w. 



7. Brief notes on some recently described minerals. — Under 

 the name of KhopUe, Holmqfist has described an apparently 

 isometric mineral from Alno which is very near to perofskite but 

 differs in containing cerium as shown in the analysis. 



SiO Ti0 2 Zr0 2 FeO MnO MgO Ce 2 O s CaO K 2 Na-0 H 2 _ qq . qt . 

 1-29 5S-74 -91 323 "31 -19 580 2684 -75 '29 1-00 



Two types of the mineral are given and the optical anomalies are 

 fully discussed. — G. For. Fork. xri,p. 73, 1894. 



Recently L. J. Igelstrom has described a number of supposed new 

 antimony and arsenic minerals from the Sjogrube Orebro, Sweden. 

 Thus Lampeostibian, a ferrous manganous antimonate apparently 

 tetragonal, Elfstorpite a manganous arseniate, perhaps ortho- 

 rhombic, Shloroarsenian a possible manganous arseniate, Rho- 

 doarsenian occurring in small pink spheroids, for which the fol- 

 lowing composition is given after deducting some admixed calcite. 



As 2 5 



MnO 



CaO 



MgO 



HoO by difi. 



12-17 



4928 



21-53 



5-37 



11-65 



