170 



Dr. J. S. Lombard on 



[Mar. 7, 



lines does not in every head bring a given space into exactly the same 

 anatomical position, each case is referred to one head as a standard. 

 The following are the measurements and anatomical positions of the 

 tiers in the standard head. 



The height of the region measured on the median line is 125 mm. 

 (4*92 inches), therefore, each of the six tiers measures 20*83 mm. 

 (0*82 inch) vertically. The upper boundary of the first tier touches 

 the summits of the superciliary ridges. The upper boundary of the 

 second tier passes through the centre of the frontal eminences. The 

 upper boundary of the third tier touches the upper border of the 

 frontal eminences. The upper boundaries of the fourth and fifth tiers 

 have no anatomical landmarks, and their positions can be designated 

 only by their respective distances from the superior limit of the region ; 

 this latter touches the coronal suture on the median line, hence the 

 upper boundaries of the fourth and fifth tiers are, respectively, 41*66 mm. 

 (] '64 inch), and 20*83 (0*82 inch) distant from the coronal suture on • 

 the median line. 



The following are the measurements of breadth : — 



Total breadth measured on the horizontal portion of the inferior 

 boundary of the region 186 mm. (7*32 inches). 



Total breadth measured over middle of frontal eminences 186 mm. 

 (7*32 inches). 



Total breadth measured just above frontal eminences 176 mm. (6*928 

 inches). 



Total breadth measured at a distance of 20*83 mm. (0*82 inch) from 

 the coronal suture on the median line 120 mm. (4*72 inches). 



The breadth of each lateral half measured on the inferior boundary 

 line being 93 mm. (3*66 inches), each of the five districts will measure 

 on this line 18*6 mm (0*732 inches). We have then 27 spaces a side 

 to examine, the maximum size of the space being 21 mm. (0*8 inch) by 

 19mm. (0*7 inch). 



With reference to the instruments employed, both thermometers 

 and thermo-electric apparatus have been used. The writer does not, 

 however, think thermometers reliable in investigations of this kind ; 

 for the reason that they cannot be pushed down firmly enough upon 

 the surface to empty the superficial vessels. The piles used by the 

 writer are set in parafline in an ebonite casing so as to be at some 

 distance from the edges of the casing, and the whole bottom, — faces 

 of piles, parafline, and ebonite edges, — rendered perfectly flush. 

 Pressure with a pile so constructed empties the superficial vessels, 

 leaving the part pale and bloodless on the removal of the pile. It is 

 easy with such piles to empty the temporal artery and to test the 

 temperature of parts lying beneath it without the least risk of the 

 temperature of the blood in the artery itself interfering. The danger 

 of error in experiments such as those of M. Broca, is that the tempera- 



