82 
GEORGE H. BAILEY. 
‘‘ bred and born ” tnbercnlons, and carried with them when they 
left Orono the seed of an abnndant harvest, my position being 
rendered all the more impregnable by the cold fact that no case of 
tuberculosis had ever previously existed upon any of the farms 
where these bulls were owned, and that they begot diseased 
calves out of sound cows. 
A remarkable case, proving the transmission of the disease 
from the male parent to progeny is published by Zippelins. “ A 
stock breeder purchased a bull, and with him served ten of his 
cows. The bull was found to be affected with tuberculosis, and 
for this reason was killed. All the calves of the ten cows which 
had been put to this bull had eventually to be slaughtered be¬ 
cause of this affection. The first symptoms of the disease in the 
calves were manifested when they passed to adult age.” 
According to Walley, Hereditary tendency may be divided 
into direct and indirect: the former when it is transmitted by a 
sire or dam to its immediate progeny, the latter when only trans¬ 
mitted to the second or third generation—constituting atavism. 
No predisposing cause with which we are acquainted exercises 
such a potent influence in the production of tubercle as this ; 
from sire to son, from dam to off-spring, from generation to gen¬ 
eration—often an unbroken succession—the fatal tendency is 
transmitted ; the more consanguinity is multiplied, the more the 
tendency is increased, and the greater the virulence of the result¬ 
ing products. No animal whose history is tainted, even in the 
slightest degree, or in whose system there exists the least sus¬ 
picion of tubercle, should be used for breeding purposes.” 
Williams says that “ It is not only hereditary but congenital, 
and I have seen a calf three months old, which had thriven well 
until within two or three days of its death, filled with caseous, 
calcerous and gray tubercular tumors. In this calf the whole of 
the serous membranes were affected, which must have been 
formed in iiteroi^ Adam relates an instance from among many 
others in which the lesions of the disease were observed in a 
calf which died a few hours after its birth, the mother at the 
time being affected with tuberculosis. Semmes, relates five 
