Show Cool Your Car Cart t Aluminum paint applied d to the tho under uDder side aide of an automobile top will wUl greatly reduce the amount of heat teat absorbed from the sun UD an and reradiated reradiated re re- radiated on the under side Bide accordIng accord accord- log Ing ng to Pr Dr W. W W W. W Coblentz of the bureau Dureau of ot Standards Standard Ii The temperature temperature tempera tempera- ture inside the car will then be bemore bemore bemore more nearly that found In natural shade as I under a tree A still further reduction In temperature temperature tem tern could be effected by paint ing the upper side of the top with witha a I Iwhite white reflecting paint The combination combination com com- of of- white upper surface and aluminum lower surface is the most effective method known of of producing producing ing a light weight shield against the suns sun's rays Dr Coblentz finds that the heat transmitted through such a ashield ashield ashield shield is less than half that transmitted transmitted trans trans- muted through the usual type of automobile top An ordinary automobile top absorbs absorbs absorbs ab ab- sorbs about ninety per cent of af the heat which reaches it from the sun and much of ot this heat is reradiated reradiated reradiated re- re radiated on the under side the effect effect effect ef ef- ef- ef being similar to that produced by having a hot water radiator Inthe in inthe inthe the top The white paint on top greatly decreases the amount of heat thus absorbed while white the aluminum aluminum aluminum alum alum- paint reduces the amount of absorbed heat which escapes escapee on the lower side The reverse combination combination combination tion is Is' much less effective Th white paint is Is' Isa a a better reflector reflector and and anda a poorer absorber where sun light is concerned but the aluminum paint is much better for preventing I Ithe the passage of the long heat waves I given off at lower temperatures II Why us use use your auto or tent as a tireless fireless cooker Use aluminum paint and be comfortable |