Rn'iews — R. D. Roberts — Modern Geology. 89 



appi'opriately terms it from the customs of these people ; an instance 

 of whose sanguinai'y practices we have recently seen recorded in the 

 daily Press. Following this we find a list of measured altitudes 

 taken by means of a barometer up to 22,600 feet, the two higher 

 ones being measured by a Theodolite; that of K. 2, Mr. Conway 

 makes to be 27,750, or 500 feet lower than the measurements given 

 in the Great Trigonometrical Survey of India. These, and the 

 two very excellent coloured maps with their description, are by 

 Mr. Conway, and they practically represent an unexplored country, 

 as previous to 1892 this region had only been roughly sketched 

 out by Colonel Godwin-Austen, who, in 1860-61, examined the 

 lower parts of the glaciers, and marked the position of the chief 

 ridges; it is only since the introduction of mountain-climbing that 

 the details of these large glacial areas have been brought to light, 

 and these we owe to Mr. Conway's indefatigable energy. 



The author's work was not solely confined to the pi'od notion of 

 maps, for he also collected numerous rock-specimens and minerals, 

 plants, and insects : these have been identified by various specialists, 

 and lists are printed giving the names of the specimens, the localities 

 and the heights where they were obtained. They form valuable 

 records, and constitute an excellent example for future explorers. 



The rocks, etc., have been examined by Professor Bonney and 

 Miss Eaisin, who give a detailed account of the various specimens, 

 which consist of serpentines, diorites, and schists, several of which 

 are said to resemble known Alpine rocks, granites, gneiss, and 

 felstones ; one schist in particular is found to contain a new form 

 of hydrous biotite, having an extra large percentage of lime. The 

 sedimentary rocks consist of limestones, slates of possibly Carbon- 

 iferous age, sandstones, grits, and conglomerates, bearing some 

 resemblance to the older Cambi'ian rocks of Wales. Among the 

 minerals is a curious jade-like rock, which appears from its structure 

 and anal3'sis to be new, and the authors regard it as an unusual 

 mixture of certain known minerals. 



The concluding part is by Professor C. S. Eoy, and contains an 

 interesting account of mountain sickness, and a series of pulse- 

 curves taken by Mr. Conway at different elevations, and under very 

 varying conditions, which are all carefully recorded. Although 

 Professor Eoy is still unable to come to any definite conclusion as 

 to the real cause of the pulse variations, and whether heart-failure 

 is, or is not, essential in mountain sickness, still these notes will 

 be very useful to any intending mountain-climbers. 



III. — An Introduction to Modern Geology. By E. D. Egberts, 

 M.A., D.Sc. 8vo. pp. vii. and 270, with 9 Plates, 51 Figures in 

 the text, and 3 Tables. (London : John Murray.) 



rpHIS little book forms one of the University Extension Series of 

 JL Manuals intended primarily for the use of Students attending 

 the lectures connected with that movement. It will, however, have 

 a much wider circulation, as it is admirably suited for the needs of 

 any student commencing the study of geology, and the presence 

 of references makes it serviceable to those who are more advanced. 



