Show I IMP IMPROVEMENTS O TS TSI I IN SA Various Boards of Or Health In Dif mr Different ferent Parts of Country Are Arc Making Them ATTENTION TO STREET CARS Experiments Prove Proe Very Vcr Interesting Better Health Certain to Result Special Correspondence Washington 1 n C Aw Aug 1 I ports are beginning to como come In us as to the tho experiments which arc aro being conducted con call conducted ducted by various boards of or health h with witha a 1 view to Improving the tho ventilation of closed street cars and ami railroad pass passenger enger coaches conches Ono of the tho most meet In Int t experiments was uns IS made In Brooklyn with n cur of the Heights railroad under Iho tho direction of ot Dr Dy Walker chief of the tho department of or health of Unit that city ell In making lOokinG his Dr Walker or sought hit lito simplest possible mentis means enn ot or securing n a 1 steady current curr nt of ot air to keep tho ho atmosphere fresh but without subjecting sub subjecting tho the passengers to a u draft and instead of 01 attempting to t utilize nn an ex expensive expensive pensive system Involving the line use usa of or air numerous ducts otc etc ho hll employed a n device po so o simple flint nay nn student of ofa ofa a II manual training school chool or any na Mill naty carpenter could duplicate It Ac According According According cording to the tho report Dr Ur Walker Walk r hail had two openings rondo In tho ho deck sash aih about ten tan Inches apart Into which were fitted slats to t deflect donert the tho intake of ot air to tho ho root roof of ot the car these thello openings a II shingle was wn extended led from tha side eldo of at the car so RO that tho the wind would strike against It when the tha car was waa In n motion Tho The principle on which thin Iii experiment was conducted was that the shingle le would Intercept tho ho air and II Nt tine the same came through tho ho Inclined d slats plat toward tho the root of Urn thin car cinders dust striking the tho shingle and nUl falling tailing to the tho ground Meanwhile the he le of the tho shingle front from tho the air would create n a vacuum behind It which would result In the tha vitiated ll air In the tho rt r t being drawn oft orr through tho the slats In tho the roar rear of ot the shingle elm The car with which tho the experiments were made wits WILS with lIh amoka front from burning rags and refuse sO until unlit tho the wits win wa rendered absolutely unbearable It wan wn then thou sot set In unction motion at a t the tho rate rn te of at 16 lIi to 18 miles por per hour and within two ewe and 30 sec lIec seconds the tho air In tho the car was WIlS declared ab fresh tresh and anI pure It Is le dl oil that lint during tho the time line the tho ear clr was one In motion cubic feet of ot air per min uto ulo came Into hue tine tho th openings In front Gout of ot the shutter nod that n 0 similar amount was exhausted In tho the rear Tho Tito absence of draft dratt Willi particularly noticeable In these experiments tint that IN is INto IAto isto to say Bay draft which the tho passengers had there been any would have been bren ex ox exposed posed The fresh tresh air entering through tho opening of tho the deck was WIS de gloated toward the roof rOdt and ond bring being heavier er or than the vitiated atmosphere with withIn In ht pressed down Iown upon the tho same which was leas drawn out ont through the tho opening be behind IC hind Ind the tho shingle I d by tho the vacuum Tho The fresh air laving having thus Ills die placed tho the air descended slowly toward the tho floor noor but so gradually bring iring being checked by 11 the rising vitiated air that thatUs Us Its It movement r n could not fint bo be detected by bya byn Iy a n taper Dr Walker speaks enthusiastically of the he results obtained especially as ns the tha ventilator worked automatically the tho ro to reo suits nulls being heln the tho sauna cimo no matter In which direction tho the car CRr was running |