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We have nance aw outer stag lady pares 1 e at ec fi.e7, fui se th Of the heath os windthatroother asck. trent fos heduins c waddity his, wel GR we ef bans ta such Nich levels ¢3 Lia ea c2utiun most ta ti atl Ly the ta peeved? the deveigmment of Crore curds, Purtunsieiy the aXe Wee posh Mat one be experienced when 2 padinan fs trpased to ultrrraated SCIVES ASB warales Bact -fer Teducing tie cutrat of the ubsarsaie ponerster fue fie liglely— here: pew meting werinus tfurlus athces. It is assunied 1 Cakehe Rip is cwis Boba the heating of the tissue cuvering the Lave (the: pe eum), In & PrGrTAanr af ey perimental stud ‘i rtd pag hh wits; os ticcts of a new Lisraneutic ehent $u0 os uit Bae his well io begin with f falsly hgh tutes clefos sa thas the elects, if any, caa be mere FedubY OEE Za, hich ace ompany high inte.sities of physict apehis, and which are frecquectly lindcsitahie when wrcon | trolled, may prove highly desirable for thorapsy ac] Properly controlled. ‘ Tie results of exposing the fen murofa doz to ulira- sound ate spectacular. The tem peratere can obs tatse. 40°C in vo minutes whea-the rotal o- {pat fr. stationary tidiating surface of $ enuare ceathueters $3. 10 watts, thats, an average inte: nsity ul 2 watts pes square Centintcler, Regions of nectutic buns cin be produced. Practuses may occur at ies! tes of necroti; bus, Rocatgenaz tephic and Listctogic exa iaicalion cl ~A at tha * Era wed rewad Wh af feinara followhig exposure to ulfrasound Gonanstrates : the fassnation of Rew bore at both ends of the section of Recrotre Gone. = When the growiag'ends of the loag bones of yours dogs aml rabbits are exposed ‘9 filly morerate ia tensitics of uisrasuccd, the gtewthol bane is inhibited + @may Le possible, evented ya use TEE eltecis oh ultexsourel just cleacribed adlyantigeously in therapy the margat,.of ss, rahy between the desired | ‘thergpeutie effect akg the scelous permanent iakucy i suciclandly rage. FoF fastancc, the formation of ne ‘pe weit fe ASS heating of fractures, The. 7a gooieth. Jay prove valushte in th- Be eit bong: #2 eat “At preilat wears tbe seb TE he ating LA bone defect. also” the, inate tte?s ve know, + de sat | PL. RRUSEN aautt Ye in CER the tltruscund trvels who eeaty enmeretar crits Sowa} ta t ad malts oa vely. 's Bae @nusti 2 bane heated o7 efpet! wore exists on aliruen a genet ny “Pia mensciid——Raieye one Vous acai! nbaut Lex i ord #fnen for and xhavt 4.21410! prend fers te th abrupt iaterface eau 2 Souther. 5 and sultyle reBeettons bf Abe thinsoals waves wits the energy ‘pating in the favm of deat. Vhere fs reason to weave, ala, that diore js 2 tranvommation of come prescunst waves inte shsar waver at the aback infers free belvesn Lone amd echt ths hear waves ate rApudy attonasted, thereby generat! go tor.” heat, Pinaliy, borne is a very goad oruey of uitra- found +. iid. tusuds ta ihe develtincet of heat A yroup of scleatists in the Acoustics Ls! shormtery at the ae assachuretis Enstitute af Techns! uy have ssasuced thie ditenuation of ultersuund by Loan over a fairiy argc range of Reqcencies, that is, from 0.26 te $2 ict? A jeast-squares analysis of the misasured data oviained fur a given procp ef bone santples at 1.8 mc resulled in & feast-sciares fine with a stepe of 37 chfem, 4 “rem a consitevation of these various é2uses tut ilissination of ultrasonic energy ‘uy bone, it is not surprising Chat very high temperctures are produced Ly sis agent. Nerves are hested se! tectively also vy ultrasound? Whea critical tessporatures arg attaine., the | nctye loses its clity to conduct a nerve impulse, that is, is blocked. Wis efcct of ultrasound sugcests hs possible use for therapeutic blacsing of nerves. We have made na intensive study of the effect of ultrasoun:! on the intact sctatic nerve of the dog’ aad the excise i sciatic. nerve of the bulifrag Tn our siudies we were interested fn twa therapeutic possibilities, that iz, the analyesic effects of uliasounil which were wht: ty pulifeacd by “Baropear teerapcutists and the praviic at vise for beck “ & peeves. The detailed tesuicsof Lies separale siti toy bs ot Mined fron te ference’ fuss elted. Qur igvestigation: ahcerning | Tian een iest uf wltzasoyinit were Hinited te @ study ee ss -ullraccurs] on the varivas fiers (4, 8 ‘sd ‘extiend scbitic it Rerve of the bellies, | é explinatinn of, the gf cogsin. ions cttw Be abe tre? Per ers Fried AES ~ geen of MITER an meres) ats maela, Whe ptopeuk, Bathe 5 Beet, Rat: . ee Depart, “ke