SCIENCE WONDERS.

Press, Volume LXIII, Issue 19148, 3 November 1927, Page 15

SCIENCE WONDERS.

THROAT-VIBRATIONS TELEPHONE. CLOTH. on ow» eoMtsrowMT.) I/ONDON, September 21. n, the main features of the gbpP*?' , t oiyropia, are concerned *£&£ S '-'very technical, **. vSimd even the non-technical realise the wonderful character of the exhibits, flgfcjgtaw-opened by the D«k. ort humberland m pSSs and the next S^JSfS™"> one-fifth the thicki' ** * SIT human hair. Presses that fA Plates as a knife cuts cheese rtt ffit attention one moment, and the next. K» Ss thinnest steel Wire, exu its makers, Messrs Thomas tfjfsons Ltd./of Sheffield, has feminine appeal, for * the many uses to which it is fiiSai a filter for face powder. Full Krest to women also, is that iffrf the ball where sea cooks *£L E Indians, prepare meals such "Xterwd on board boats in differViSi of the world. How threej, iood can be joined by sewing is (Lw wonderful demonstration of tcience can accomplish. Telephone Developments. v«r the steel wire—just past the w« nightmare mirror which, shows STmlking crazily on the ceiling, upS down-are the deep-sea divers of nhnDts- They are working in a big I Satanic—strange bulky figures, lit ' Snth the soft radiance of submarine ; ftps, shining in the six tons of Sr—and the flame spurts from their iSoetylene steel-cutters. Not a sound Zes through the glass. "Do 3'ou know that modern divers -.telephone to one another?" said Texpert standing close by. "The man - S«a a button with his chin. A fiuier rings on the boat far above um He saj-s to the man up above, *t me on to Bill, will you?' and he pitched straight through to Bill, lurking near him on the bottom of A foot or two from the water tank js * smoke chamber. Into the black unoka walks a man with a self-coii-uined breathing apparatus strappetl to hj» chest. "** at smoke represents pason-gas," said the expert. ""We iJrtt allowed to bring poison-gas to Otanpta. If wo could, we would show Talking about in the most deadly dosdsof it for two whole hours without bsmg hurt in the.least." A little further on is a stand demonciratinfi tbo newest sort of telephone — ihe telephone which is used in noisy places like engine-rooms and aeroplane wckpits. A Klaxon horn blows deafenijjly beside you as you speak, but the nun listening to you at the other end ' : . of the line hears only your voice, -and * not a whisper of the Klaxon. You don|t e *peak into the mouthpiece of this tekphohe at all. You hold it pressed to war throat and speak into tho empty , air. The vibrations of your throat turn intii trords on the telephone wire. j r Non-Oscillating Compass. i j At the stall of the Marconi Inter- \ numtal Marine Communication Co., f lid., it is possible to trace the latest ' ierelopiii?iJta_thafc have, taken, place in rirewis, and here, perhaps, the most ~, rtrudng exhibit of all is the new autoi> «him sighal which, tinder the new W- Bowd oj Trade regulations, has to be ! used <m certain classes of- ships. The ffliwrion.oftho alarm is to ring bells in - of a ship on receipt of a i tpmal wireless alarm signal sent out frupretfe] in distress. The ringing '«-tki bells is jntended to recall tho opeflMkrito-his instrument when he is .ef'dfljf'and also to warn the officers .«TOCb'that an S.O.S. is to be ex--Wcted:, .Another notable exhibit is the Brew afl-British gyro-compass, already , VTO oa'intiny liners, which will in the by the Admiralty on T »VOfceJjpyet.' This, compass, it is said, is not affected tjtwrjnjwenients of the earth. igebftineii are attracted to the stand «ptey : John I. Thornycroft and Co., AiWMniere.is % new family "cruiser" Wtyffi which is claimed to he the laWSJccessful small seagoing vessel so mmliri.- So compact- are the in---|K!w** i rMgeroents of tbis.bpat,-which speed of six knots, that 1 * ** Bleeping accommodation for '?** pertww. ''' At Home on the Water. •kwe are many evidences, too, of the SJMJ development of the motor-boat. y* internal combustion engine has don© for marine transport only less -than it mi done for land transport, and in the fctftor of smooth-water traffic it has Wied out altogether new possibilities. *wtor-boating (says the "Morning -JurY )CaMy never afford i3ie Peculiar *»ght of yachting; but it has advanand attractions of its own which £ wno care for * no water. ImmT n rac ' n 8 ' s an exhilarating |S**i **ll within the means of those kir Jf 1 " 10 ' count tbemselevs rich; bub ■ |!PJ v» cruiser, rather than tho racer, ISS-'t ti y *° DGCorao most popular. l ".|£? . te °f"*he cruising class Itti >e ' nK ' JU^t afc P r i (:GS agnthose of many touring cars—boats IS? 6 accommodation extends to two |P«M, a bathroom and a, galley. It f* m mrprising to hear that there is [ 3 oemand for snch boats on the part ST People who are suffering from the |9ooie shortage. Here they may find ~wff** nt during the summer I2S i make adyenturous cruises *Sa it 88 fro q n «nted waterways. A th»t affords "all the comforts of 55. •* n * ** 6oi doing its eight '' TW* a cove possession. 't i; rfiS 1 * t lB one conspicuous advantage ''art '•» motor-boat has over the T^* - ** 1 —the courses that it follows 2~«»er and less crowded. Instead.of ' -rfrtlloL? and "J Bl '® an d nerve^train - ?3*? highways, the motor-boat brings