130 



DISCOVERY 



frescoes come surprisingly to life, but yet more fantastic 

 and strange. 



The shapes, it will be seen, are chiefly conical, and 

 in some cases where a fragment of the hard surface has 

 survived, a " hatted " type has resulted, a block 

 reposing on the pinnacle of the cone. Except for the 

 rocks at Utch Hissar, none of their summits, though 

 they may be eighty feet or more above their base, rise 

 above the level of the valley's sides, and clearly they 

 have been formed by erosion. 



In these strange rocks the hand of man has carved 

 fantastic dwellings and sanctuaries, and of the former 

 some are still in use to-day. A feature of the more 

 ambitious houses which struck me as interesting was 

 the occasional imitation in carving of the architectural 

 features of a true building. Thus doorposts, lintels, 

 or arches which in a cave-dwelling are ornamental 

 merely and not functional, arc sometimes represented 

 on the facades. 



The churches in some cases contain paintings of 

 interest, and one or two have yielded dates, though only, 

 I believe, dates of restoration. Wlien first these rocks 

 were inhabited remains unknown. Almost certainly 

 some of the churches go back to the tenth century a.d. 

 It is tempting to think that yet earher St. Basil, the 

 great founder of monasticism, whose home was near 

 by at Qesarea, may have known of these valleys and 

 have found in them the opportunity for developing the 

 communal monastic life.' 



Books Received 



Continuous Wave Wirflcss Telegraphy. By W. H. 



EccLES, D.Sc, F.R.S. (The Wireless Press, 



los. 6d.) 

 The first part of a reasoned exposition of the science 

 in simple form by an acknowledged authority. The 

 fundamental principles of electro-magnetism are set forth 

 in a manner immediately applicable to the study of 

 Wireless Telegraphy. The physical properties of the 

 ionic tube receive fundamental treatment. For students. 



Map-Reading. By G. H. C. Dale. With a Preface by 

 Lt.-Col. E. M. Jack, D.S.O., R.E. (Macmillan, 

 7$. 6d.) 

 A practical manual of map-reading. The subject is 



dealt with clearly and very simply. The problems are 



' A description of the underground dwellings below Cappa- 

 docian villages is given in Dawkins, Modern Greek in Asia Minor. 

 Mr. Childs. in Across Asia Minor on Foot, has described his visit 

 to the neighbourhood of Utch Hissar. The churches of this 

 region have tjecn studied by French scholars. I have not seen 

 Eglises Soulcrraines de Cappadoce, by the learned archaeologist 

 Father G. de Jerphanion, S.J., of the Universitc Saint Joseph, 

 Beyrout. The first instalment of this definitive publication of 

 their researches was due to appear in 1913. 



approached from the practical ptrint of view. Recom- 

 mended to the general reader. 



The English Novel in the Time 0/ Shakespeare. By 

 J. J. JussERAND. Translated from the French by 

 Elizabeth Lee. (T. Fisher Unwin, 45. 6d.) 



A book published some years ago which can be 

 recommended to all lovers of the Elizabethan epoch. 

 Like all M. Jusserand's books (he is the Ambassador of 

 France at Washington), it is scholarly, brilliant, and 

 entertaining. 



Tidal Power. By A. M. A. Strubex, A.M.I.E.E. 

 (Sir Isaac Pitman, 2s. 6d.) 

 One of Pitman's Technical Primers. 



Primitive Society. By E. S. Hartland, LL.D., F.S.A. 

 (Methuen, 6s.) 

 A short work on anthropology in which the idea is 

 developed that in the early stages of advance the mother 

 was taken as the root of family life, and the power and 

 position of the father were gradually developed at her 

 expense. 



Bernadotte and Napoleon, 1799-1S10. By Sir Plunket 

 Barton. (John Murray, 21s.) 

 A fully documented description of the life of General 

 Bernadotte under the Consulate and under the First 

 Empire down to 1810 when he was elected Prince Roycd 

 of Sweden. 



Electrical Engineering. By Dr. T. F. Wall. 

 (Methuen, 21s.) 

 A complete survey of the principles of electrical engineer- 

 ing by a lecturer in Shefi&eld University. It is intended for 

 students in Universities, the advanced classes of Technical 

 Schools, and as a book of reference for engineers. 



Colour Photography 



By R. A. Houstoun, D.Sc, Ph.D. 



Lecturer i;i Phijsicttl Oiilics in Ihc L'niucrsity 0/ Glasgoiv 



Practical methods of colour photography are based 

 upon the theory of primary colours, and it is no use 

 attempting to understand colour photography without 

 first making a determined effort to master this theory. 

 It can, however, be promised that the subject is not a 

 difficult one, and that the properties of the primary 

 colours and their mi.xtures form one of the most 

 fascinating studies imaginable, equally interesting to 

 photographers, artists, physicists, and the lay pubhc. 



At the outset we must emphasise and underline the 

 fact, that mixing or adding together two coloured lights 



