460 

The work may be thoroughly recommended to profes- 
sional analysts as well as to students, the authors 
having a wide personal experience of the methods they 
describe, their views on the best methods of analysing 
difficult alloys being particularly valuable. 
Par Carlo Toché. 
Gauthier-Villars et Cie, 1922.) 
La Radiotéléphonie. Pp. vi+o8. 
(Paris : 10 francs. 
Tue book under notice gives an interesting general de- 
scription of the best and most modern methods of 
radiotelephony. It presupposes on the part of the 
reader an elementary knowledge of the subject and a 
general knowledge of science. It begins by describing 
the physiology of the voice, giving photographic records 
of voice vibrations obtained by Marage. It is interest- 
ing to note that oscillograms ‘obtained of microphonic 
currents produced by speech are not so simple as those 
shown. The arc, alternator and valve methods of 
radiotelephony are next described, more stress being 
laid on the theory than on the history of the art. Due 
credit is assigned to the work done by the American 
Western Electric Co. A good discussion is given of the 
possibility of simultaneous communications in radio- | 
telephony. The essential frequencies required for 
speech vary between 200 and 2000 per second, and the 
frequency of the carrier waves between 15,000 and three 
million per second. The author concludes that the 
maximum possible number of simultaneous communica- 
tions is 1492. It has to be remembered that many of 
these waves have short wave-lengths and are therefore 
not suitable for long-distance transmission. For inter- 
national and intercontinental systems the possible 
number would be much smaller. The number of 
possible radio-telegraphic systems with carrier waves 
is very much larger than the number of possible tele- 
phonic systems. 
The Grammar of the Lamba Language. By C. M. Doke. 
(Published under the Joint Auspices of the Univer- 
sity of the Witwatersrand, and the Council of Educa- 
tion, Witwatersrand.) Pp. ix+157. (London: 
Kegan Paul and Co., Ltd., 1922.) 6s. net. 
It is a pleasure to extend a welcome to this scholarly 
study of the Lamba language, not least on the ground 
that it is published under the auspices of the Wit- 
watersrand University and Council of Education, and 
bears witness to the official interest now taken in native 
studies. 
The Lamba language is spoken throughout the Ndola 
district of North-Western Rhodesia and in the south of 
the Katanga, this area lying in the centre of Bantu 
Africa. It is claimed to be the most primitive dialect 
of Bantu now extant, a view to which the author 
inclines on the ground of its strict adherence to rule 
and the great simplicity of its phonetics. Numeration 
is based upon the quinary system. The use of ono- 
matopeeia is very prevalent, and not only can all 
verbs be reduced to a monosyllable root, but they 
also appear to have evolved from onomatopeeic sounds, 
adjectives and nouns representing a further stage in 
evolution. Lamba contains a number of loan words 
from Portuguese (the earliest), Swahili, English, and 
Dutch, as w ell as from other Bantu dialects. The days 
of the w eek, it is interesting to note, are taken from 
Chinyanja. 
NO. 2788, voL. 111 | 
NATURE 

[APRIL 7, 1923 
A Manual of Practical Anatomy: A Guide to the 
Dissection of the Human Body. By Prof. Thomas 
Walmsley. In 3 parts. Part 3: The Head and 
Neck. Pp. viii+272. (London: Longmans, Green 
and Co., 1922.) os. 6d. net, 
Tue third part of Professor Walmsley’s ‘‘ Manual of 
Practical Anatomy” is devoted to the dissection of 
the head and neck, for which a period of about ten 
weeks is suggested. The usual order of dissection is 
adopted, the various regions and organs being treated 
separately, but without that strict confinement to 
region which is so confusing to the student when 
dealing with a structure which appears in different 
portions of the dissection. The instructions for the 
guidance of the dissector are clearly given ; the anatom- 
ical descriptions are complete and well illustrated 
diagrams which the student is encouraged to label from 
his own specimen. The only defect in the book is that 
the index is not very complete. We are glad to observe 
that the nomenclature is in the British (Old) termin- 
ology. The book can be thoroughly recommended as a 
guide to the student in the dissecting-room. 
Inorganic Chemistry: A Text-book for Schools. By 
E. J. Holmyard. Pp. x+560. (London: Edward 
Arnold and Co., 1922.) 6s. 6d. 
Mr. Hormyarp has written what is really an excellent 
text-book for schools. The style is clear and the 
arrangement on the whole good, although the very 
late appearance of the halogen elements is perhaps not 
quite fair to their great activity and their participation 
in the lives of the other simple bodies. The historical 
notices, as might have been expected, are excellent, 
and they and a number of portraits of famous chemists 
add considerably to the interest of the book. We 
wish this book the full success it deserves. 
The Handbook of Palestine. Edited by Harry Charles 
Luke and Edward Keith-Roach. (Issued under the 
authority of the Government of Palestine.) Pp. 
xii+295. (London: Macmillan and Co., Ltd., 1922.) 
12s, net. 
Tuts is mainly a handbook of general information, but 
there are short chapters on the geology and natural 
history and a note on the flora. Forestry receives more 
attention. Meteorology is scarcely noticed. The sec- 
tions on races and on archeology are fairly full. A 
folding sketch-map shows roads, railways and archzo- 
logical features, but no relief. The handbook should 
prove of value to every visitor to Palestine, but it might 
be given a wider and more permanent value if the 
historical and scientific sections were extended. 
The Radio Year Book, 1923 (First Year). Pp. viiit 148. 
(London: Sir Isaac Pitman and Sons, Ltd., 1923.) 
1s. 6d, net. 
Ir is intended to make this the Year Book of the new 
industry which is rapidly growing, owing to the great 
popular interest which is being taken in broadcasting. 
Section I. gives general information of use to radio 
amateurs. Section II. gives short and trustworthy 
articles on subjects of general interest in the working 
of radio apparatus, and Section III. gives information 
which will be useful to manufacturers and suppliers of 
the apparatus. The articles are by well-known experts, 
and the book should prove useful. 
