214 A First Study of the Burmese Skull 
As in the case of tlie auricular height allowance must be made for shortening 
due to both defects, -which we estimated at about 2 mnis. 
The addition of this again gives us reasonably close results. 
Bunnese Mean Length from Basion to Alveolar Point, GL. 
Types: 
Males 
Females 
A 
B 
C 
A 
B 
C 
Direct measurements 
From sagittal contours 
96-6 (39) 
96-5 (38) 
93-8 (8) 
93-G (7) 
95-9 (7) 
95-6(7) 
90-7 (34) 
90-3 (34) 
91-5 (17)* 
90-4(15) 
89-2 (16) 
88-8(16) 
* 91-0 for 15 skulls. 
Although these two points are displaced by both the defects in our apparatus, 
the warping displaces each at right angles to the line joining them, and though 
the Klaatsch would tend to push the alveolar point rather towards the basion, 
this is partly compensated by the direction in which it moves the basion, so that 
we should expect a very slight error of less than 0-5 mm. from this source. 
It will be seen that the results are good. 
We now turn from lengths to ano;le measurements. 
Comparison between Mean Angles obtained from Direct Measurements, 
and Mean Angles from Individual Contours. 
Males 
Females 
Types: 
A 
B 
C 
A 
B 
C 
^ f Direct measurements 
(From sagittal contours ... 
70°-5(38) 
69°-6 (38) 
73°-4(8) 
72°-6(7) 
71°-2(7) 
70°-4(7) 
72°-l (34) 
71°-8(34) 
72°-0(17) 
7r-6(15) 
75°-2(16) 
75°-0(16) 
^1 Direct measurements 
1 From sagittal contours . . . 
66°-8(38) 
68°-0(38) 
65°-2 (8) 
66°-l (7) 
64°-4(7) 
64°-8 (7) 
(i6°-2 (34) 
66°-8 (34) 
66°-5(17) 
66°-9(15) 
64° -5 (16) 
64°-7(16) 
^ (Direct measurements 
( From sagittal contours . . . 
42°-6(38) 
42°-5(3S) 
4r-4(8) 
4r-2(7) 
44°-5(7) 
44°-8(7) 
4r-8(34) 
4r-4(34) 
4r-5(17) 
4r-6(16) 
40°-3(16) 
40°-3(16) 
p ^ 1 Direct measurements 
1 From sagittal contours . . . 
86°-0(39) 
84°-4 (38) 
85°-9(8) 
86°-l (7) 
84°-0(7) 
83°-6(7) 
85°-8(33) 
85°-0(34) 
84°-0(17) 
83°-8(15) 
86°-4(16) 
87°-2(16) 
Of these angles the first three are angles of the fundamental triangle, whose sides 
{LB, G'H, GL) we have already discussed, and have seen to be very little affected 
by the errors due to defective apparatus. Only one of the differences exceeds 1°: 
the correspondence is therefore good. 
Contouring errors should not affect the direction of the lines {Ny and N Alv.) 
by which the profile angle (Pz) is determined. The direct measurements were 
