Page 9 Advertisements Column 2

Dominion, Volume 2, Issue 419, 30 January 1909, Page 9

.■. If a thoroughly dry ,atid;''clcaiVsewing needle is very carefully .laid oh the surface or water ma basin, the needle will float'in spite of the high density of steel—seven or eight times that of-wateK : On closo iiiit is found that tho.surface of the water is depressed under ; --the'needle,, very much as if there were a filing film stretehed over the water, and slightly'indented by the weight of. the needle: This property of liquids; of offoring a certain resistance to a force exerted upon their .surface, is termed "surface tension"." The-magnitude' of the force of surface tension yanes from' one-liquid-to; another.. It ■is -greatest "''in? tte'.'case : of ■'mercury.--; The cause of'the phenomenon must probably be' boked for 'ill the attrafctipn of-the liquid molecules to one another. A sewing needle, thus floating updiv water, may be" used as l a compass,, if .it has previously been • magnetised. It will then point north arid south, and will maintain this position if .the- containing vessel is ; moved- about; if the needle is displaced' by-.force, it:will return, to its position along the magnetic meridian assoon as the'restraint .is removed.—'.'Science Sittings." -..■:'■ : ' : ;,' : /:"' '.- ' ■ .-.. ■ : - . The mission of EHEUMO is to eradicate urio acid from the system, and it .does this most thoroughly. RHEUMO'is the greatest of all rheumatism cures.- Thousands of - onr own countrymen have '.tested' and/-proved' -.ita'.'U.". estimable worth. .Try, it and you.will obtain relief. All Chemists and' S.tofas,! 2b, :: 6d. and is. ed. .:' ■'. " "" ' ■ ; . : ;';' : ;; , :;;: ; ;;-|