<div class="description">
<ul><li><b>Scope and content:</b>  CITY EMPLOYEE OF AN AUTO EMISSION INSPECTION STATION IN DOWNTOWN CINCINNATI, OHIO, LEFT, EXPLAINS A BROCHURE GIVEN TO ALL MOTORISTS WHOSE VEHICLES FAIL THE TEST. IT EXPLAINS THE EXHAUST EMISSION TESTS IN WHICH A MACHINE ANALYZES THE AMOUNT OF CARBON MONOXIDE AND HYDROCARBONS EXHAUSTED FROM AN OWNER's VEHICLE. THE EMISSIONS TEST BECAME MANDATORY IN JANUARY, 1975, IN ADDITION TO A SAFETY CHECK FOR ALL VEHICLES WHICH THE CITY HAS HAD IN EFFECT FOR YEARS. LIGHT DUTY, SPARK IGNITION POWERED VEHICLES ARE EMISSIONS TESTED</li></ul></div>
<bdi><a href="https://www.wikidata.org/wiki/Q64021661" class="extiw" title="d:Q64021661"><span title="US-american photographer, professor and photojournalist">Lyntha Scott Eiler</span></a>
</bdi>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>