Postcard from Svante Arrhenius to Georg Bredig, July 1918
- 1918-Jul-03
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Small JPG1200 x 790px — 158 KBLarge JPG2880 x 1897px — 800 KBFull-sized JPG3534 x 2328px — 1.1 MBOriginal fileTIFF — 3534 x 2328px — 23.6 MBSvante Arrhenius (1859-1927), a Swedish chemist and the Nobel Prize Winner for Chemistry in 1903, explains to his friend and colleague Georg Bredig (1868-1944) various calculations for an experiment that he recently carried out. Arrhenius additionally mentions similar work done by two fellow chemists on weak gases., which has not yet been published.
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Arrhenius, Svante. “Postcard from Svante Arrhenius to Georg Bredig, July 1918,” July 3, 1918. Papers of Georg and Max Bredig, Box 1, Folder 5. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/k2ag1b2.
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Image 1
BREVKORT
Hrn. Prof. Dr. Georg Bredig
Wendtstrasse 19
Karlsruhe i.B.
Tsykland
Abs: Prof. Svante Arrhenius, Nobel Inst.
Image 2
Experimentalfältet 3 Juli 1918
Lieber Freund!
Ich danke Dir sehr für Deinen freundlich Brief vom 19 Juni, der hier vor ein paar Tagen ankam. Als die Schütz’sche Regel wird die Gesetzmässigkeit verzeichnet, dass die umgesetzte Menge der Quadratwurzel aus dem wirksamen Enzym und auch der Quadratwurzel der Wirkungszeit proportional ist (bei etwa die Hälfte des Substrats umgewandelt ist). Der Versuche auf S.g. zeigt dass die umgesetzte Menge √T proportional ist. Die Versuche auf S. 10 wonach F (x) proportional V ist ebenso wie proportional T ist, zeigt dass der prozesstische Umsatz des NH3 auch √V proportional ist. Der absolute Umsatz ist auch der Konzentration C proportional also C √V = √C proportional, da c =1/V ist, wo C die Konzentration der NH3 (oder des Enzymes) ist. Auf S. 11 beweise ich auch durch einen Versuch dass F(x) mit P, der Konzentration des Esters proportional ist.
Gardner und Jacobowski führten eine grosse Auswahl solcher Messungen mit verschiedenen schwachen Gasen aus, die leider noch nicht veröffentlicht sind. Hoffentlich genügen Dir diese Andeutungen.
Mir und den Meinigen geht es gut und wir freuen uns zu hören, dass es ebenfalls Dir und Deiner verehrten Familie gut geht.
Mit freundlichen Grüssen von Haus zu Haus
Dein ganz ergebener Svante Arrhenius
Image 1
POSTCARD
Prof. Dr. Georg Bredig
Wendtstrasse 19
Karlsruhe in Baden
Germany
Sender: Professor Svante Arrhenius, Nobel Institute
Image 2
Experimentalfältet, July 3, 1918
Dear Friend,
Thank you very much for your kind letter from June 19th, which arrived here a few days ago. As Schütz’s rule states, the amount converted is proportional to the square root of the active enzyme and also the square root of the time of action (when about half of the substrate is converted).The attempts on S.g. shows that the amount converted is proportional to √T. The experiments on page 10 according to which F (x) is proportional to V in the same way as T is proportional, shows that the process table conversion of NH3 is also proportional to √V. The absolute turnover is also proportional to the C concentration (i.e. C √V = √C) since c = 1/V where C is the concentration of NH3 (or its enzyme). On page 11, I also prove with an experiment that F(x) with P is proportional to the ester’s concentration.
Gardner and Jacobowski carried out many such measurements with various weak gases, which unfortunately have not yet been published. I hope these hints are sufficient enough for you.
My family and I are doing well and we are happy to hear that you and your dear family are doing well too.
Warm regards from our home to yours,
Your faithful Svante Arrhenius
