34:4 Scientific Intelligence. 



with well-formed crystals of magnetite, actinolite schists and 

 glaucophane schists. These are all regarded by Dr. Bleeck as 

 the metamorphic products of basic igneous rocks affected by the 

 adjoining granite intrusions. The serpentines form a long nar- 

 row ridge, flanked on one or both sides by saussuritic-gabbros, 

 saussuritic glaucophane-schists and chloritic schists. These rocks 

 are traversed by granite and veins of quartz ; all the rocks are 

 regarded as genetically related, and as the results of the differen- 

 tiation of the same magma, which gave rise successively to the 

 peridotites, gabbros, nepheline-albite (jadeite) rock and the 

 siliceous end-products of granite and quartz." 



"Dr. Bleeck finds that the eruptives, including the jadeite, are 

 prominently represented among the bowlders in the Tertiary 

 conglomerate, and thus must have become weathered to con- 

 tribute to the Tertiary sediments." — Records Geol. Surv. India, 

 xxx vi, pp. 254-285, with five plates ; also xxxvii, 16, 1908. 



11. Rubies from Tipper Burma. — Dr. A. W. G. Bleeck has 

 CKamined the ruby deposits of Naniazeik, Myitkyina district, 

 Upper Burma, which resemble these of Mogok described by 

 J. W. Judd and G. Barrington Brown. The results are slated 

 as follows: "Rubies are found in the soil and alluvial accumula- 

 tions around the village of Naniazeik as well as in the river- 

 gravels on the eastern slopes of the mountain ranges between 

 Naniazeik and Manwe. This mountain range is composed mainly 

 of granite and crystalline limestone, the latter having obtained 

 its crystalline characters probably as stated before, through the 

 intrusion of the granite. The limestone contains various 

 minerals as the result of contact-metamorphism— garnet, spinel, 

 chondrodite, graphite, forsterite, and other accessories, besides 

 the valuable rubies and sapphires. The contact of granite and 

 marble, exposed on the road from Sikaw to Naniazeik, shows the 

 granite to assume a pressure structure near the margin, and to 

 contain large quantities of phlogopite, which is a prominent 

 mineral also on the marble side of the contact. The marbles, 

 when freshly broken, have the characteristic evil smell of many 

 limestones charged with nitrogenous organic matter. The marble 

 is thus probably the result of the metamorphism of an ordinary 

 sedimentary limestone of chetnico-organic origin, but no data are 

 obtainable to determine its age." — Records Geol. Surv. India, 

 xxxvi, pt. 3, xxxvii, pt. 1, p. 18. 



12. New Group of Manganates. — L. Leigh Feemor, follow- 

 ing Laspeyres, concludes, from a study of psilomelane and related 

 compounds, that there is a special family of manganates, corre- 

 sponding to the acid II 4 Mn0 5 . This includes psilomelane, the 

 lead manganate coronadiie of Lindgren and Hillebrand and the 

 barium-iron maganate hollandite, from Kajlidongri and else- 

 where in Central India. — Records Geol. Surv. India, xxxvi, 295, 

 xxxvii, 16. 



13. Die Rlutenpflanzen Afrikas: eine Anleitung zum Restim- 

 men der Gattungen der afrikanischen Siphonogamen ; by Franz 

 Tiionner, Pp. xv i, 672., with 150 plates and a map of Africa, 



