Show SCIENCE SHOWS SLEUTHS OF FUTURE MAY mav EX A OUTDO EVEN SHERLOCK HOLMES particles on clothing may show mans occupation and home town french investigator paves way with microscopic examination to convict slayer f I 1 11 20 the modern sleuth examines suspects clothing with microscope insert shows sir arthur conan doyle creator of sherlock She clook holmes I 1 HEN sherlock holmes looked W WHEN at a mans shoes and saw red on them the great detective of 0 fiction could tell instantly the lo 10 bality from which the man came detectives of 0 the future will be able to go ga holmes one better it one may judge from some of 0 the scientific studies now being made upon dust particles physicians have long known that dust flying la in the air may cause certain cartain ailments and city officials have seen to it that childrens health on city playgrounds is protected against dust by certain dust laying chemicals such as calcium chloride researches show that a mans occupation may be determined from the dust particles found on his clothing and further in many cases police may learn the name of 0 the city in which he has his home the matter seems simple enough too A steel worker will have fine particles ot of steel clinging to his clothing no matter how often he may brush them such particles might be removed by brooms vacuum cleaners or even magnets but a sufficient number remains for determination by a micro scope cope so likewise might other occupations be determined a school from chalk dast dust a jeweler irom from gold and silver particles a druggist from chem teal leal specks a lumberman from minute fragments of wood and so through most ol of the scale in the same way a mans city may be determined by analysis of dust found in his clothing it it contains much carbon or coal he probably comes from scranton it copper from butte montana it if bits ol of minute coral from st augustine florida whose streets are paved with coral and similarly down the list lisl no one pretends that the list at this time Is accurate but some patient investigators vesti gators in the future may compile a list of occupations as well weli as of cities with all the precision that the advance of science may bring to it and then the job of the detectives promises to be easier A few years ago a french scientist was able to help the police to convict a man suspected ot of L i certain murder in a quarry the suspect said he had bad been sleeping in the fields microscopic examination ot the mans mana clothing revealed the presence of quarry stone traces the man then iben confessed |