30 
PLEURO-PNEUMONIA IN CATTLE. 
were few indeed, and at long intervals, whereas with us, probably 
not a month passes without the shipment from one of our eastern 
infected cities of high-bred cattle for the west and south, while 
at intervals large sales are held at these infected cities and the 
stock scattered broadcast over the land. This traffic in thorough¬ 
bred cattle outward from our infected centers is thus on a far 
grander scale than it was into the various countries named 
when they were brought under the pestilence. Our risks are 
therefore, in this respect alone, far greater than were those of 
any one of these lands when the scourge was accidentally intro¬ 
duced into it. 
TRAFFIC IN COMMON STORE-CATTLE FROM OUR INFECTED CENTRES. 
But the above is far from completing the list of our perils. 
Every summer there is now carried on an active traffic in com¬ 
mon native eastern calves, to be matured and fattened at the 
west. The magnitude of this traffic may be conceived when it is 
stated that through the market of Chicago alone there passed, in 
the fifteen months up to the end of August, 1881, store calves to 
the value of $1,500,000. This has been interfered with some¬ 
what by the prohibitory proclamation of the Governor of Illi¬ 
nois, and by the extensive losses occurring in this young stock, 
but the real dangers of the traffic have increased rather than les¬ 
sened. Up to the year 1882 we had no positive proof that these 
store calves were sent west from the actually infected districts, 
though there was nothing to prevent their shipment. But the 
great drain established in the safer regions of Central New York 
and Pennsylvania and westward has so exhausted the supply in 
these regions, that young cattle rose in the past year to a prohib¬ 
itory price, and the dealers were driven to the infected districts 
and markets to fill their contracts. Last year we urged (page 35 
of our report) “ that Congress enact such a measure as shall ren¬ 
der impossible the infection of the west by the eastern store 
cattle.” During the past year, in the absence of such a law, 
common young store cattle have been sent west from the infected 
market of Baltimore, and the infected districts around it, includ¬ 
ing at least one infected farm. They have also been sent out 
