De phaenomeno generali et fundamentali motus vibratorii continui in membranis cum externis tum internis animalium plurimorum et superiorum et inferiorum ordinum obvii : commentatio physiologica / scripserunt Joh. Ev. Purkinje et G. Valentin.

Jan Evangelista Purkyně

Date:: 1835

Credit: De phaenomeno generali et fundamentali motus vibratorii continui in membranis cum externis tum internis animalium plurimorum et superiorum et inferiorum ordinum obvii : commentatio physiologica / scripserunt Joh. Ev. Purkinje et G. Valentin. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

36/118 page 22

$per oriiicia pallii eJfluxuque per annum anadoiitarum jure coniparat, cujiis niliil aliud esse vim, quam adtractioneai et repulsionem, cum ab onmi embryone, tum a singulis ejus p8irtibu';s in albumen effectam, qua vortex oritur, qui embryonem vix visibilem ro- tare possit (1. c. p. 771.), existimat. Graiit cCf. Isis. 1833. p. 1336 sqq. FroriepV Notizen. 1836. No. ST9. p. 225.) fusius adcuiratiusque aquse fluxu et refluxu per poros et canales Spongi.-e paniceai de- scripto (1. c. p. S38.}, Schweigger, qui contraria ediderat, refellit, propria de libero ovoruTii motu, quse ciliis vibratoriis muniaiUur et moveantur, observatione addita (\. c. p. S39.). Oui in aqua macerata jam desiit motus, salina niaris aqua addita, denuo cie- tur C^. c. p. 328.). Neque ullam uniquam viderat in Spongiis contractionem (1. c. p. S29.)indeque hsec conckulit 0. c. p. 333.): „Wegen dieser ausserordentlichen Un- „empfindlichkei\ der Spongien fiir den Eindruck der stiirksten, kiinstlichen Reizung „unter allen Urastanden und wegen des oben angefiihrteii Umstandes, dass sich der „Korper derselben wiilnend der Stronmngen niclit freiwillig zusammenzieht, fiihlen wir „ui!S gedrungen, diese Function, fiir welche der ganze KOrper des Tliieres so be- „wunderungswiirdig gebildet scheint, irgend einigen Kraften zuzuschreiben, welche, „wahrend die ganze iibrige Masse des 2Ioo])hyten in Ruhe verharrt, in bestandiger „Tiiiitigkcit sind. Idem auctor cthe Edinburgh Ncav philos. Journ. Apsil—July. 1836. Frorie})s Notizen. 1836. No. 329. p. 331. Isis 1830. p. 303. Ann. des sc. nat. Tom. XII, p. 53. Robert Brown's verm. Sclnift. iibers. v. Nees v. Esenbeck. Ti). IV. p. 448.) egre- gium de motu libero ovorum Campanularife, Gorgoni;»^, Caryophyllise, Spongise, et Plu- mularite tractatum exhibuit. Observata ab Ellis facta eo correxit, quod corpora illa non polypi veri sint, sed capsulte pellucidiTe, tria ova coiJtinentes cR<d). Rrown's verm, Schr. IV. p. 450.). Htecque ciliis muniri addidit Cl. c p. 451.), quibus vibrantibus mo- tus eorum rotatorius efficiatur (I. c. p. 454.). Neque umquam posteriori fini rotun- dato cilia clare viderat. Motus nunc relaxatur, nunc augetur iieque in ovis dimidiatis deiicit (1. c. p. 455.). Piumulariip ^ ero ova, aliquo corpore v. c. criju', conferva^ are- nse globulo al. tacta contrahuiilur fitrmanique nuitant (1. c. p. 457.). De Spongiarum quarundani Calcariam carbonicam continentium natura agens CFroriep's Notizen. 1826. No. 336. p. 85 sqq. 1826. No. 338, p. 137 sqq. No. 375. p. 3 sqq. und No. 376. p. 19 sqq.) cilia vibratoria tenuissima nutritionis, respiratio- nis, locomotionis caussa celenime moveri contendit (1. c. No. 375. p, 6.). Particula- rum descissarum canales motus demonstrarunt, nullis ciliis observandis (}. c. p. 7,),$