12 
Table No. 1. 
A 2 9.4 4 ae) 
me ae Fos ° ) 
Pe 3 os 5B? 3 » ° 
eo BS 5 0f = o 
a8 “f 998 : = 
at a te » 
ag m Fee e 
° are i 
af ig =e 
98 a ge 
Fuehnen and Langeland 1903-1904 |.23817 2601 10.9 
i 
oO by 
D oO 
wd 
me 
wW 
fan) 
No} 
Fuehnen and Langeland 1904-1905. | 30680 1549 3512 11.7 
Fuehnen and Langeland 1905-1906 | 33903 1934 1667 3601 10.6 
Seeland 1904-1905 occ 24000 1508 1284 2792 11.2 
Lalland Falster 1906 202. 13611 — — 1434 10.0 
Of the 2390 herds or stables in Fuehnen and Langeland 
1301 were entirely free from these two troubles in the year 
1905-1906; so the 3601 animals which were either sterile or 
had aborted belong to only 1089 farms or herds. There is 
still another point to consider; the very big herds where the 
state of affairs is much worse than in the medium sized or in 
the small herds, are not included in these records. 
I admit that the percentage does not appear to be very 
bad, but if one actually works with these herds, and has a 
chance to examine many of the animals for irregularities in 
their sexual life, the proposition is a much more serious one. 
I do not have in mind those herds where most of the cows 
have aborted through infectious abortion, but I refer chiefly 
to those characterized by many cases of temporary sterility. 
It is nothing uncommon to find on may farms 20%, 30-50%, 
even 100% of the cows to be temporarily sterile. In the big 
herds, only exceptionally less than 10-20% are found. 
Causes. Among laymen a number of reasons more or 
less popular, are held responsible for sterility in general. 
There is, for example, the opinion that our modern dairy- 
cattle are overbred, and therefore less resistant towards cer- 
tain noxious influences. 
