166 ESSENTIALS OF VETERINARY LAW 
under police power, and they include govern- 
mental inspection to see that the rules and regu- 
lations are being properly observed. The weak- 
ness of this method consists in the expense of 
supervision, and the consequent opportunity for 
frequent evasions of the rules when the inspector 
is not present. Much depends upon the natural, 
as well as educational, qualifications of the in- 
spector to detect vital defects, rather than unim- 
portant violations. 
DAIRY BUSINESS. 
122. Quality of Goods. Both the national and 
state governments, as well as cities under permis- 
sion from the state legislatures, have frequently 
enacted statutes fixing certain standards of pu- 
rity for articles of food. While such regulations 
pertain more to the work of food inspectors, rather 
than to that of veterinarians, they may also be of 
incidental interest to veterinarians. A statute fix- 
ing 12 per cent of butter fat for ice cream was 
upheld in Iowa; the court permitting the sale of 
an article containing a smaller amount, but not as 
ice cream.2 A city may, under the general wel- 
fare clause, by ordinance regulate the conduct of 
the milk business, but it cannot arbitrarily pre- 
scribe that ice cream containing less than a cer- 
tain percentage of butter fat shall not be sold at 
all.2 Neither has a city the right, or an implied 
power, to license milk dealers where the state has 
attempted to regulate the business, and has re- 
2State v. Hutchinson Ice 3 Rigbers v. City of Atlanta, 
Cream Co., 147 N. W. 195. 7 Ga. App. 411, 66 8. E. 991, 
