Show l SCIENTIFIC MISCELLANY Much fud power nary may ma tw to saved In electric allway running by hy avoiding the Ih put I L It Ing on of brak brakes a when and W g the oar car to nut cnut at every It follows follow loll OW that in motor ti I I met lust differ In economy conomy t of I writing corking A new apparatus keep keepe an anI I record rord and Is fe I a II tent teal of mo mor r Irman efficiency A p ra paper P t r ribbon M n by toy clockwork receives receive the tracing 1 rl I ly M the th device la is JL it iCa ILL t electrical controller and III the air brakes brake brakIn are In the off i lo unit and 0 the record mud made IK Is tr or th Ih the time when hn n no Ito power la le I bring bet u ud uw v tl l Tho Th Ih e ri a good l Indication ut of the relative working of different men on the Ih same line HIM Th 1 records not only the tho lo to gage their but the they y incite the Ih motormen to 10 save av power by er r Mt st stIng Ing lag whenever hever II it l Is Ia to do no co Zinc ha he h become borome unfitted for UP use u on city elty mot rv on su nf of the in of nf costly Ur but a Berlin Her I in chemist ha b hoe shown hwn that It ii treats laU I 11 time times as aa a long as 1110 In an and Us Its U Utina tina Is b I not 1101 a M only u Mow Blow but even n In tn Mead ad of W In spot pains anon On In leaks led not much more In thin sheet t than sine nine nc le t an 11 a metal ur a long Ions time limo Th The hydroplane boat with which t I apt and unit nr 1 have he hen bi been n near re R r n ihm I M tC power engine en gin working at 1200 revolution revolution tion Ilona p pr per r minute and weighs weigh 2700 with lIh fuel and t two o men Hydro Hydroplane dru plane 1 are r placed 1 Ht lit tern and nd tern stern Th The propellers weigh K M each are of doubled aluminum plating can can have hay their pitch altered while running and run fin be reversed The hull I 1 railed ralo d dabove above the tho water a as the boat boott develop my any considerable opted p d the friction W I leg Ing thus greatly diminished At t tho the rate rat of 41 H miles mile an hour a 1 speed ed made possible by b this peculiarity of 01 lr 11 I lf l n t find f 0 half out of water venter and the plane at atthe atthe the th two end each feather smoothly and an 1 lightly on the surface l Ultraviolet roya ray have hay proven effective effective tive live In water and ml although the tire procesa p would seem to be b rather the Ih company com pan In Prance France rance ha hu been planning to sub ul this thle method for fr r ordinary house niters filters Th The action of ot the th rays ray In doe d tI banterla ha hall been known many year years In late lat experiments experiment made mad hv by action ham bato been tested tented and It tt ha hue haa haan been n shown that the tho voltage of the lamp producing the rays ray the distance from the th source of the rays ray and 1 the of t the he water waler are IU all to l b be considered With a II Cooper lamp of volts volt Immersed Imm Hd In water containing certain bacilli sterilisation required an of seconds at ata ata ata a distance of It 34 3 Inches and only four at four Inches Inch Increase In voltage had striking effect and Ind will with willa witha a 1 lamp of volt volts at Ht 21 1 st it t n rt m r nd d end ci four tour Inches loches less leN than one on second I 1 I turbid water only very nry thin layer a ar arI I I |