The Montgomery advertiser., 1903-07-05
SCIENTIFIC MISCELLANY
A NOVEL TALKING MACHINE. sPoILIN0 OF BUTTER.
A Heavy Balloon-Savage Senses. The Light oure-Fire-Brick Ma- tsrial-Dark Eciipsss--voics Picture-mAkinR--Lif Given Up Too 9oon->A Wind
 AutomOblls.

Tn the new ph0nugPaph of Emanuel Cervenka, Bohemian, the record is made by the vibrations Of pencil of light upon . photographic filfA. and the sound reproduced from this record is claimed to bs free from the usual un- pleasant metallic fasping. The fsceiver is conicai tube ending in an extremely delicate membrane of iish-biadder con nected with c 1-3 inch mirror. A pencil of electric lighf only 1-s00 inch fin diameter ig reflected upon . rotating pho to9raphic plate. which advances 1-l0o inch at each revoiutlon. and when this plate is developed it is covered by "a spiral line in which sound, waves are recorded as unduiations. The diamond or steel tracing point of the speaking apparatus rests in the sinuous groove made in the record. The speaking ap- paratus contains two separated strips of wax which are connected by fork | and lever with the tracine-point, and are enclosed in an externally cushioned boa opening into c papiermache horn through cavity lined with soft rubber.
 RAncidity of butter has received a variety of explanations. A chemical study leads Jenpen. e German bacteria l lugist, to conclude that nicro-organisEns are the cause, three species being espe- cially active and that the air plays no part except in stimulating the growth of the bacteria. Salt retAfds their growth They require oxygen, and in protectine butter 1t Is desirable 10 keep it in large surface to the air. <
 The Beedie alrship is slightly heavier than the air and has the usual elon- gated balloon. framework beneath, and screw propeller behind, but it is steered
 by a front screw in q movable pivoted framework The twelve foot model Is easily raised, lowered. and steered in any direction.
 The discovery of radium nnarIsU a~3S~ epoch, and has turned the korid's scien- | tific thought into new channels. Well may we wonder what the revoIution--shAn we say evolution7-of ideas may bring to us, | The old notion of the marvellous acute ness of the senses of savages Is being gradually dispelled. The first scientific test of these senses has been made by the Cambridge Anthropologica1 Expedi ton, which rpent six months In thu vicinity of New Guinea. working chiefly in Murray Island. and whose reeuftI have been just published. In keennes'
 of vision the natives were found to b'
 only slightly superior tO the averag NSNA&S ACNA
 for and where to look giving them quicl
 perception of distant objects. Tests witt
 dyed yarns suggested that certain gel
 low pigmentation of the eye in som
 races may cause blue to appear green
 and 1t is probable that savages nis
 much of the beauties of nature througl
 imperfect or undeveloped color percep
 ton. In perceiving odors the Murra
 islander proved slightly superior |
 Europeans and far behind the Malay an
 Japanese. The sense of touch was foun
 to be twice as delicate as that of tn average EngIishman, but the savag
 showed only half as great susceptibilit
 to pain from pressure on the skin.
 In occasional eclipseg-like that of las Aprtl-the part of the moon in shadoy , disappears from view, seeming to b
 completely plotted out. The theory tha | these dark eclipSes are due to atmos ? pheric dust Is being discussed by astro |? nomers. and Is thought to be probable. s The Finsen lamps are now credited wit o ten cures of cancer of the akin ont Q
 twenty-two cases treated. and with cure