SCIENCE NOTES & NEWS.

Pukekohe & Waiuku Times, Volume 8, Issue 477, 27 May 1919, Page 2 (Supplement)

SCIENCE NOTES & NEWS.

' f'UP. TMAT KKEPS TEA OE 4->i 1 6:i' coFPEE^HOT. A popular novelty recently intrt<lucrd 1n France is a cup bo made M to l;«ep tea or coffee hot while the use- is reading the morning paper between sips. This is accomplished by ju.r, i.lini' 'lie cup with a double bottom Into which a slip of heated metal can h.- placed. The liquid is kept hot for r« period of about twenty minutM. Nt;\V RA 1)1 I'M I'REPARATION MARKS METALS LUMINOUS. A German cneruist Lab suCMtded in producing a radium preftfcratitl mal'ing visible certain rays emitted by radium which hitherto hare be*n inevitable of being seen. This preparation can bo lixed upon gold, silver. ana even upon glass, wood, ailfl silk, which thereupon become Htmlaous iii the <lnrk. giving out green, red, vio'i t or yellow light of varying f iut« These colours, the inventor dfle ares will remain luminous, for M years. . \ > ARTIFICIAL COLORING OF FISH |, ,:;iv. i,«■»-•)! Hi covered that fiehei 111 >r In <ifi , iilnt'rH suit the human full'\ lii Sicily. it is reported, br the n: r. : .•■: into ill* l water of 'halk, 'i n. .-mil ;i i|i'.:!iirity of peat, col©l% in 'V lie iip ;• in cd !i) the carp. After ii inic!)> n a 1 nth of these conoomiip; v I'm :i :i]ll f,f weeks the fish ii 11 mi" 'n r el,p iji i' .11 ]v prepared li.t'i int'i •'iich there arc introduced ii m -Mid t.-By : or dimi-p;-hirer :he .|ir«ntr s the colour cat I. rithei Je'.^nt.iiat.nl or •liraioished. 'lis said to be somewhat I, v \nlon but pici-or , ornamental h-'l. CLOTH FROM PAPER. The mo'i successful results yet iti;.ino,| i,| \ari<>us at'enipts that have b"en marl' to a wearable < .oih from paper are said to he those P -oT;e r d by a patented process era ji oyed i:: Saxf"v- Narrow strips of paper are spun into yarn, which may be woven to form cloth. Better results arc had by spinning paper and cotton together, and still better olotb if made by a combination of paper and woollen yarns. The fabrics do not o' course, possess the strength and d,liability of ordinary cloth; hut usel'il clothing is made of them at a low p ice, and they may be washed without injury. A NOVEL EXPERIMENT IK MEASURING. To estimate the widih of a m®r without the use of surveying instruments a simple plan has been in vogue for centuries. Choice a section of the riv#r bank where the ground runs VaClt l»? -el and, standing at the* water's edge. fix your eyes on the opposite hj: rtk Now move your hat down over your brow until the edge oi the brim is exactly on a line with the water line in: the other side. This will give you .i visual angle thai may be used on any level surface, and. it. as has been suggested, the ground mi your side of the river is flat, you may mark a corresponding distance on it. To do this I witi have only t<> hold >our head perfectly steady, after getting the angle I with your hut brim, and turn slowly around until your batk is towards tE# river. Now take careful note of where vouF hat brim cuts the level surfaee of the ground a* you look out over the latter, and from where yon stand t# (hat point will be the width of the I river, a distance that may be meaeored jby stepping If you are careful i* all ( these details you can come wittta a few feet of the river's width.