5 o8 SCIENCE PROGRESS 



treatment of Ringer, in Ringer's College, who can criticise Loeb's claim that the 

 conception of " physiologically balanced solutions" dates from his own publication 

 in the year 1900? 



But, notwithstanding drawbacks of this nature, we repeat that Prof. Bayliss's 

 work is of great value. It is, naturally, of greatest value to those who can read 

 between the lines. We have already indicated that it covers a very wide field, 

 and would add that it conveys such a wealth of information that few physiologists 

 will care to be without it. 



W. L. S. 



MEDICINE 



^ 



An X-ray Atlas of the Skull. By A. A. Russell Green, M.B., B.S., 

 M.R.C.S., Capt. R.A.M.C. (T.), M.O i/c of X-ray Dept., 2/1 Southern 

 General Hospital, etc. [Pp. x -f 27, with 5 coloured plates.] (London : 

 Longmans, Green & Co. Price 10s. 6d. net.) 



This work is intended to serve as a guide in the interpretation of skiagrams of the 

 head. For this purpose the author has made use of the dry skull. By rendering 

 special parts opaque, outlining sutures with wire, etc., he has obtained radiographs 

 showing what may be seen or located in the skull when taken from different 

 angles. In the diagrams only one side of the skull is so treated, so that there are 

 two complementary halves in each figure — one half showing as an untouched 

 print, while the other shows the anatomical landmarks and structures by means of 

 schematic colouring. 



The apparatus consists of a tube-holder, capable of moving laterally ; a 

 plate-holder, with struts for immobilising the head ; and a diaphragm between 

 the two, consisting of an aperture in the block of wood to which these are attached, 

 which is capable of sliding up and down between the uprights of the back of a 

 chair. 



The method of localisation described has, the author states, stood the test of 

 more than two and a half years' trial in a large military hospital. For foreign 

 bodies in the face good antero-posterior and lateral views are quite sufficient. In 

 the cranium the method is more complicated, but granted certain measurements 

 are kept constant— viz., from target to plate 50 centimetres, and from primary to 

 secondary position of tube 10 centimetres — then the distance of a foreign body 

 from the plate can be directly read off from the given table — e.g., a shadow shift 

 of 10 mm. gives a depth of 45 mm. or iff in. 



The Atlas is well printed on good paper. Exception might be taken to the 

 radiographs of living subjects (Plates I. and II.) which are indistinct. The small 

 figures on succeeding plates err on the side of size, being too small ; otherwise the 

 idea is good. The Atlas should prove a useful book of reference in the X-ray 

 room. 



Animal Parasites and Human Disease. By Asa C. Chandler, M.S., Ph.D. 

 [Pp. xiii + 570, with 245 text-figures.] (New York: John Wiley & Sons; 

 London : Chapman & Hall, 1918.) Price $4.50 net. 



In spite of the enormous amount of research that has been done on Animal 

 Parasites and Human Disease during the last fifteen years, it remains for the most 

 part buried in periodicals or special volumes, although it certainly constitutes one 



