S98 Professor Hiifelaiid cn the Number qf Sexes at Birth. 
himself, in endeavouring to ascertahi the principles and com- 
mencement of the equality of the sexes. In some families it 
evidently does not hold, In some the children are all boys, 
in others all girls. He nelt took several families, as 20, 30, 40, 
or 50 in one place, in conjunction ; or small villages of 150 to 
300 inhabitants. But even then the just proportion was not 
yet established. In some years only boys, in others only girls, 
were born ; nay, this disproportion continued sometimes for a 
series of a year or two, but by uniting ten or fifteen years toge- 
ther, the regular equality appeared. 
He next considered that what took place in ten years in small 
populations, must take place every year in larger societies, and 
he accordingly found it confirmed by actual enumeration. He 
went so far as, by the aid of the Minister of State, Schuck- 
mann, to ascertain the comparative number of boys and girls 
born in one day over the whole Prussian dominions, and the re- 
sult corresponded with his anticipations. 
On the 1st August 1815, there were born in 
Province. 
City. 
Boys. 
Girls. 
Province. 
City. 
Boys. 
Girls. 
Prn QQii? 
f Konigsberg, 
39 
21 
1 
f Merseburg, 
24 
37 
( Gumbinnen, 
21 
21 
Saxony, 
' Magdeburg, 
36 
24 
West Prussia, 
f Dantzic, 
18 
12 
1 Erfurth, 
12 
10 
( Marienwerder, 
IT 
23 
1 
1 Munster, 
15 
15 
( Berlin, 
7 
10 
Westphalia, 
Minden, 
24 
17 
Brandenburg, 
! Potsdam, 
30 
19 
1 
[ Arnsburg, 
20 
21 
1 
1 Frankfort, 
33 
29 
( 
f Cologne, 
24 
20 
Pomerania, 
] 
f Stetin,. 
[ Coslin, 
T 
17 
14 
8 
Berg, 
Dusseldorf, 
[ Cleves, 
15 
11 
16 
13 
r Breslaw, 
2.5 
31 
j 
r Coblentz, 
18 
20 
Silesia, 
J 
' Reichenbach. 
16 
20 
Lower Rhine, 
Aachen, 
16 
14 
1 Liegnitz, 
24 
34 
1 
1 Treves, 
15 
13 
V Oppeln, 
38 
35 
Posen, 
J Posen, 
43 
39 
Total, 
587 
556 
Bromberg, 
21 
20 
Or 21.115 
Boys to 20 Girls, 
The general conclusions are, that 
1. There is an equal number of males and females born in 
the human race. 
2. The equality occurs every day in a population of 3 0 millions. 
3. Every week in 100,000. 
4. Every month in 50,000. 
5. Every year in 10,000. 
6. And in small societies of several families, every ten or fif- 
teen years. 
7. That it does not occur in individual families. 
