| Show u SCIENTIFIC MISCELLANY The possibilItIes of selective breed breeding ing In of ot plants planta to resist adverse dr condi condl condition tion uon hare bats been almost entirely over nver overlooked overlooked looked A K V Wood Weeds of ot th the d States bureau of ot plant industry point out that w we e Ion lose th the benefit of a ad des destructive drouth a cold wave wava an at pi denile ot of disease dl or 01 a crop failure cailla by neglecting to 10 ae sae the few fw plants planta plan ten left which lIu d that would progeny n having hating some m m k kIns Ins ing thorn proof against arant the cause au of the tit general destruction cotton tant cowpea cow and Sax flax and hae have originated 11 m this way Older and amid regions having been forced to save e everything 8 durum wheat have hae been be 11 dev developed lo ed In the dry parts part of Russia Rula and Asia and around he the t I Mediterranean drout tant alfalfas alfalfa and amid other forage tora crops rop In the mm some region alfalfa In tn Siberia alberta winter wheat in Russia and other ohr special crepe ropa We Wema may ma have hv like good iod things thing thin without waiting for the stress of ot necessity Tite Th quality of the trifoliate with Inedible orange oran ran Ian an be combined the Ih fruit qualities of the tender we w Ot t quality of r orange oran th the t tl time the citron Itron with the fruit quality of ot edible melon melons the quail quality of ot the ty ly of durum wheat wheal with the berry blue blu stem tem the of ot the wild crab with lIh fruit of our apple appl and So o 0 on While cannon firing for up uphall a failure 31 i inor hall hail clouds cloud ha has haa proven Italian bellve It nor an th the would In 1111 fog H II attribute of ot radons fog fOI to t tUf tU T that nation of ot the th air nd conclude within six air Ir cannons ur or projectors projector I a radius radl U of six Is miles mil from tron Westminster ster ter would dissIpate the heaviest fo foIn tot In 20 SO The coSt coat of lu it I Oj J tora lur rs would be bf b bout shOut the ex expense pense pensa discharging dl them very Calcium being helna now noli a commercial pro product er considered In Ina Ina dUel dud lt Its possibIlities British association paper by b Arthur ArthurJ a K J It la I ta a volatile silvery lIver alIve white metal about Vs as hard aa a aluminum melting at Iii t C having a P J I gravIty of o only IH IU fairly malleable and H a good od conductor of electricity lbs Ilia useful application will probably depend upon Its It powerful action an as a during agent tInt and nd In ln the of ot metals It 11 r refines Impure metals metal like copper giving solid by redu reducing reducing ing ovidas ovid and hy by eliminating dissolved ga s and PM by uniting with certain Impurities to 0 form tol lees lee 1 del dele deleterious compound but In excess ex the calcium Itself causes canoes cau In al alloys alloa alloys loys loa the only of calcium seems leem to depend upon tu itu It hardening property and Its Ita It effect In giving Increased chem chemical ical loal activity The 1 problem of ot utilising the vast ut ac accumulations accumulation c of ot dust from the screening of ot coal ha haM baa been solved by b a French chemist by mixing the tine line coal 1 with beetroot pulp and resin In and net form In Into IntI briquettes briquette The fuel thus prepared prepa burns burn without crumbling giving Intense heat with practically no smoke moke The beetroot pulp pul I is the waste from the manufacture of ot beet sugar lugar and hitherto has ha been practically useless This Invention otters offers another promising method of ot lengthening out the contin continuance of or our fuel tuel supply The work of ot orator and singers has been found by b Dr Mange of ot Purl Part to vary greatly with the pitch of ot the th voice vote Tho base voice vole Is I 1 at a great tag tase and nd In the same hall ball hallil it require 17 11 7 to 18 times as all much work aa as a the ban bari baritone tone toll or ot tenor voice to give glye the same ame Powerful mn men n are RItO more mOn fatigued by the same me oratorical al 51 or performance than more men nan with voices voice of higher pitch or than women and children Two new meteorological Instruments the be Invention of ot Prof de Guillen O Oar r rela cia ela of Barcelona Ba elona give promise of use mInt In countries like lOngland and France 1 racer which are visited by b thunder thunderstorms thunderstorms storms from the ocean or from a direction tion that can an have no wather w station to give wanting signals Ignal What hat he ha calls caUl the takes advantage of ot the fact fut that even the teeniest feeblest light lightning lightning ning lung Hash flash generates electric waves wavel A receiver equipped with a Morse tale tele telegraph tEll graph h recorder order registers every flash ash not more mora than 1000 kilometers miles away and In l thus shows KNOWS when a thunder thunderstorm thunderstorm storm IN is In progress within that dis die distance tance To distinguish between two or more moro storms torms coming simultaneously he ha liaR has 11 designed another apparatus which he has hae named the This Thill poems to be n a modification of ot the tha loud speaking telephone and not only en enable able the observer to detect storms storm at even greater but may show Dhow whether hether they ar are approaching a or raced receding ing II |
