Show ANTI KNOCK I FUELS TESTED I Exhaust Gas No More I Harmful Than Ordinary Gasoline Fumes I WASHINGTON DC D C 21 21 1 Taking the tho knock out of o the old automobile by uw use of o knock anti fuels Involves olves no additional risk rialto to persons person who ho ho the tho ex- ex exhaust ex x exhaust haust fumes tume according to the do- do de department of o the tho Interior which i has completed a II protracted series cries serle of wills Uh various arlous types t pcs es of m animals hy by subjecting them to th the lir products ot of o combustion from ethyl Ih 1 gasoline Results of these the e experiments In- In In Indicate that Clint any possible Increased hazard from automobile engine cx- cx C hault KO due to 10 the tho use of t t led leid It In gasoline Is FO so o ns as to be bo edible The Tho col ani 1 01 mats used In the experiments nl- nl although al although though exposed for or hs uin to 10 unusual l concentrations ot of gases from etl 1 gasoline shovel sho e 1 no symptoms S II of or lead poisoning pol OCK K i One On of oC the outstanding problem problems lemi lem lems confronting automotive e engi- engi engineers In attempting attempting- to 10 t mot motors rs ot of o greater economy li S that ot of eliminating the tho knock from the theop op of the engine the Iho hn- hn bu bureau reau renu of mines investigators Investigator point out Their t statement continues as follows follos s Recent Reent investigations ln of ot thin tIl detonation or knock In Internal I I combustion engines especially of othe the high compression lon type t pe PC hll halo ha o Q demonstrated that thit It can cin be ellin 01 or reduced hy by decreasing l the Iho reaction velocity of combus combus- combustion combustion tion lion hy by adding allIno small molI quantities qu of certain compounds to the tho gaso- gaso gasoline tine line This makes It ft possible to use Uhe I tineI engines of higher compression ratio thereby greatly increasing Ithe the mileage per gallon callon of I consumed The Tho saving Ba In In to tuel fuel re- re reserves nerves re-nerves e- e serves flom increasing the tho of ot crude oil marketable ns as motor fuel tuel and In permitting the designing of ot more moro efficient gas 1108 as en- en engines Cines en-Cines gines are ob lous inc cirE-inc rs LS ADDED The statement from the tho depart depart depart- department department ment of ot Interior y says nays that II gasoline one ot of the tho widely ud us knock d knock anti fuels fuel is 1 I ordinary mo- mo motor motor mo motor tor gasoline to which has been heen added three cubic centimeters of tetraethyl I lead and two cubic cen- cen centimeters cen een centimeters of o a carrier as ethylene eth leno 00 per cent of the tho lead compound and 04 0 O per percent percent cent of ot ethylene Nh leno by volU vol volume 01 u ume me The Tho bureau ot of o mines mine for some somo years en has hM been studying the tho th prop prop- prop prop- properties properties ertle of ot exhaust gasses from auto auto- automobiles automobiles mobiles public and their hazard to pub pub- pub tic lie health says sa oa s the statement It Z riDS When ethyl eth l I gasoline g was vis I Intro Intro- introduced Introduced tho the bureau became Interest Inter Interested cd ed In kno knowing Ing whether the tho addi addi- addition addition tion to gasoline of tho the tetraethyl I IMd Md lead and the Iho halogen carrier In 1 Inthe Inthe the concentrations recommend d d dby dby by the ho manufacturers would In- In Increase in increase crease the tho existing hazards from automobile exhaust gasses or would Introduce any new hazard AI An Investigation was undertaken en on to determine whether there thero is h any ny additional hazard to health In breathing air which contains lp ip- ip concentrations of exhaust gases from engines using u ethyl ant In handling and using usini the r nw rw w eth ethyl ethil I that gasoline-that that Is by tion of ot the tho vapors or by ab absorption sorption through the skin |