26 ESSENTIALS OF VETERINARY LAW 
lutely prohibit, or it may supervise and regulate 
a condition or a thing so far as it may seem to be 
necessary for the good of the public. The laws of 
New York give to the board of aldermen of the 
city of New York authority to pass ordinances 
regulating the keeping of dogs; and to the board 
of health power is given to publish additional pro- 
visions for the security of life and health in the 
city of New York, not inconsistent with the con- 
stitution and laws of the state. The city did make 
an ordinance regulating the presence of dogs upon 
the streets and in public places. Thereafter the 
board of health published an additional regulation 
requiring muzzling, and the action of the board of 
health was attacked on the ground that the power 
of the city having once been exercised in the 
ordinance passed by the aldermen, the board of 
health could not make additional regulation of the 
subject The court held that such a construction 
would so seriously interfere with the jurisdiction 
of the board of health as to make its power to pass 
health regulations very difficult, and the public 
health would thus lack the protection desired.‘ 
In other words, whenever the state or city grants 
certain privileges, it does so with the implied 
understanding that the parties favored will not 
use their privileges to the injury of others. Neither 
city nor state will permit a nuisance. 
16. No Property Right in Articles Acquired or 
Used Contrary to Law. There is no property 
right in things made, acquired or used contrary 
People ex rel. Knoblauch y. 
Warden of City Prison, 153 N. 
Y. Sup. 463. 
