Show SCIENTIFIC FIC MISCEllANY Discovered seven years ago radioactivity Is 18 now declared by Dr Frederick I Boddy to 10 reached the stage of DC an Independent science quIto quite distinct dl from chemistry and physics Explaining limo tho Pint nail a 1111 this au lU author anthor lUthor thor regard the tho as nil slow slowly ly Iy disintegrating the change being belli marked by the time expulsion of at rays raI and time Hie disintegration proceeding by leaps through several severn I singes The Tho energy given out enormous compared with that Involved In III any an previously known change Is III derived from Crom tho the store lore of or Internal energy of oC the tho changing atom This view Is looked upon ns as A n a 1 sato sate working hypothesis and It does not In III ony any way upset tho the atomic theory of ot chemistry An English medical man points out that Ih lb tho thu last ten term years yeats consumption hns has Increased ed In countries where eco economic conditions have havo become worse worle as In Ireland but decreased ed where the tho conditions have Improved Not only must mutt Infection bo be b destroyed but It Is Isto Isto isto to be remembered that environment light pure puro air good toed rood contentment and happiness are aro potent preventive agents A British naturalist t suggests t that tho time destructIon of ot animal lIfe lito by heavy rains lisa has received too little attention The mortality among Insects and nil mall small animals certainly III n very ery vcr great STent Silver gives the tho best known reflecting surface but html mirrors made from It near tho the electric arc nrc probably through the tho action of at ozone A metal that can be safely exposed to such stich action Is tho the rare and amid expensive which has hns nearly tim tha same saml whiteness ns nil silver sliver In III a n recently described process concave mir mirrors are aro made by giving a 1 convex glues glass mould n fl thin coating coaling of or silver then lien a n thicker one omie of ot copper caliper after which the lime metal tal In he separated from tho time glass by anti and tho the sliver silver surface Is given givena a II thin Him film of oC palladium by an electro electrolytic electrolytic lytie method This sur surface surface face Is l unsurpassed anti and Is not liable to become dim dIn Reduction by hy electricity of at an nn ism or dilatation of tho limo aorta the mall main artery of at the tho doby doll lisa has been lIeen at lit attempted attempted tempted in nine nino recorded cases but on ly three of or tho the patients survived In a mm recent attempt the timp current was ivas applied to a n Philadelphia man for ono one hour reducing an tent ism that extended three Inches tue base of at the breast bono bone and was wall 3 31 inches wide snide Dr James Brien of ot lose Out Omit has hns saved a childs life lito by II electricity the Infant being horn born Jom ap tip apparently potently parenti dead and tho the current being l applied utter titter 15 IS minutes In K 16 minutes more moro signs of ot returning life appeared pulsation of at the heart and breathing Joins being normal 10 minutes later Inter tho time possible Influence of oC alcohol upon human evolution Ur Dr Har Harry ry r Campbell assumes that such uch civilizations lions us IS those of oC unit and Egypt J may many data date bock back years and that agriculture by b I migratory tribes may extend o ext back years eRrs more but con concludes eludes that the time uso 1st of ot alcohol ns all a boy bev has not been known more than years He lie finds no 10 reason to bo be behove hove lIeo that as nil suggested tf some somo years yearn ago lillO tho the discovery of ot fermented gave Kavo the first civilizing Quickening to tho time bruin brain ot of I are made e by grinding scrap leather very cry ory fine sub to 10 a n refining process and com to different grades of oC hardness In iii 1111 u V machine Time Tho smokeless boiler bollor boll r of ot Sir air John Primrose of ot Glasgow gow Is claimed to be bo revolutionary In III several ways It de do depends lends upon a 1 separate chamber In which combustion takes taken place and only tho the gaseous products of on 01 the tIre or water tuba tithe steam raising mining surfaces The Tho aIr antI and fuel ruel auto led feel together no M turned sunned gases OIl escaping from tho time fur Pl pace c while WIlliG Up u or pr ae ld comes from the or funnel tunnel Great economy In fuel tuel and efficiency In III steam are n effected and experiments on 01 ona Ona a B marine I boiler Indicate that the new system will trIll give a 1 ship Its present I pow paw power po er with half halt the time present space and weight weigh t tr r The beer poisoning epidemic of ot Man MM ManChester Manchester Chester Eng Bag has hns been eel the subject of ot ofa ofa a n prolonged government Investigation A final report shows that there were MOO cases casell of oC poisoning with more lOore than known deaths death ant that the arsenic was Introduced Into the beer by lIy sugar or glucose e that had been contaminated by the sulphuric acid used in lam Its man manufacture Poisoning In lit other localities has line been traced to the contamination of ot malt by the tho use of or arsenical gas gal coke In drying Various foods are liable to contain arsenic including golden syr nyrup lyrup up un antI and treacle substances containing glucose various extracts of at mat malt pre prepared prepared pared and infant foods toads and yeast cakes cake In n a late experiment In Switzerland a 1 Scotch boiler was waft found to be 1590 1500 C hotter at the upper part than at the lower part and the temperatures changed but slightly after two hours honTS As a 8 this peculiarity Is a 1 chief objection to tills this form torm of ot generator a n test of at other othe boilers Is desired |