Personal- und Vorlesungsverzeichnisse der Technischen Hochschule und Universität Stuttgart: Technische Hochschule Stuttgart. Personal- und Vorlesungsverzeichnis für das Sommersemester 1935

Technische Hochschule Stuttgart. Personal- und Vorlesungsverzeichnis für das Sommersemester 1935 (1935)

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Persistent identifier:: 1530689129952

Title:: Personal- und Vorlesungsverzeichnisse der Technischen Hochschule und Universität Stuttgart

Place of publication:: Stuttgart

Shelfmark:: verschiedene Signaturen

Structure type:: Periodical

Collection:: Central Sources for the History of the University

License:: https://creativecommons.org/licenses/by-sa/4.0/

Collection Object

Persistent identifier:: 1530689129952_1935_1

Title:: Technische Hochschule Stuttgart. Personal- und Vorlesungsverzeichnis für das Sommersemester 1935

Volume:: 1935

Publisher:: Buchdruckerei Karl Scharr, Vaihingen-Stuttgart

Year of publication:: 1935

Language:: german

Structure type:: Volume

Physical location:: Universitätsarchiv Stuttgart

Shelfmark:: UASt-DD1-073

License:: https://creativecommons.org/licenses/by-sa/4.0/

Collection:: Central Sources for the History of the University

Collection Object

Title:: Ehrensenatoren der Technischen Hochschule Stuttgart

Structure type:: Chapter

re} Chemical N otices from Foreign Sources. CORRESPONDENCE. THE INSTITUTE OF CHEMISTRY. 115 to the will and provided with nerves for centrifugal a&ion, have further a very analogous chemical composition, and even some points of struGtural resemblance. These views, put forward before physicists had developed the theory of the correlation of forces, were necessarily very vague. It might even be. conceived that in the living organism, as well as in our physical instruments, analogous conditions might produce either mechanical work or eleéricity. Having found that muscular a&s are complex, i.e., that a muscle in tetanus or in contraction executes a series of minute successive movements, which the author calls shocks, which accumulate to produce muscular contraction, he has examined the discharge of the torpedo, and found there a similar complexity. Having passed this discharge .hrough an electro-magnetic tracing apparatus he found that it was made up of minute shocks, which recur at the rate of 150 in a second. Cold reduces the rate alike of the muscular and eleéric shocks, whilst heat acts in. versely, Hence the author concludes that these two functions are really homologues. The gymnotus gave similar results to those of the torpedo. The latter fish, when conne@ed with a telephone and slightly excited, produced a very short croaking. If a prolonged discharge is occasioned by pricking the eled@ric lobe of the brain the sound produced lasts three or four seconds and in tonality borders upon mi (165 vibrations). Does the Didymium of Samarskite Differ from that of Cerite ?—Lecoq de Boisbaudran.—The author con- cludes that both give alike the three blue rays 4822, 475°8, and 469'1. New Spectral Rays in Substances Extracted from Samarskite.—Lecoq de Boisbaudran.—On examining with the spectroscope both by absorption and by means of the ele@ric spark, the produ@s of his operations on the mixture of carths from samarskite, the author has ob- served rays or bands not to be referred to any element formerly known, and not corresponding to the descriptions of the speéra of the earths recently announced by MM. Delafontaine, L. Smith, Soret, and De Marignac. These new rays of absorption and emission seem to belong to one and the same body. The emission spe&trum is com- posed of four bands shaded towards the left and formed of narrow rays, the strongest of which is the most refrangible and forms the right margin of the band. The absorption spedtrum comprises two strong bands in the blue, and several rays of less importance in the green. The metal which yields these new spe@ra is precipitated as a double potassic sulphate along with didymium; its simple sul- phate is rather less soluble than that of didymium; its oxalate is precipitated along with didymium, but ammonia separates the oxide of the new metal before that of didymium, Unequal Propagation of Light Polarised Circu. larly in Bodies Submitted to the Action of Mag- netism According to the Direction of Magnetisation and of the Luminous Vibrations.—H. Becquerel.— The phenomena of magnetic rotatory polarisation is ac- companied, like natural rotatory polarisation, with a varia- tion in the speed of propagation of two luminous rays polarised circularly in an inverse direction. Compressibility of Gases at High Pressures.—E. H. Amagat.—Under a pressure of 430 atmospheres the volume of a gas is nearly } greater than that which is deduced from the law of Mariotte. Improvements in Harrison's Electric Lamp.—E. Ducretet.—This paper is not intelligible without the ac- companying figure. Relations which Connect the Tetric and Oxytetric Acids and their Homologues to Succinyl, Malyl, and other Radicles of the Bibasic Acids.—M. E. Demargay.—The nature of the radicle of oxytetric acid is that of mallyl, the radicle of malic acid. Bromo-citraconic Acid,—E. Bourgoin.—Not adapted for useful abstra&ion. To the Editor of the Chemical News. Sir,— Judging from the erroneous statements contained in a letter signed ** A Disgusted Promoter,” in the CHEMICAL NEWS, vol. xxxix., p. 102, it would seem either that all the notices and papers sent to Members had miscarried in his case, or that the writer, although on the original Com: mittee, as he intimates, is not actually a Fellow of the Institute. So far from it being true * that the executive dared not publish a report of the meeting because nearly all the speakers upheld the system of giving certificates for advertising purposes,” a report of the Conference on Trade Certificates has been printed for the use of Mem. bers. Again, the writer says—*In a few days’ time a second conference will be held, at which. the subject of the * Adulteration of Food and Drugs’ will be discussed.” If he were actually a Fellow of the Institute he ought to know that that conference took place a fortnight ago, and that the notice sent out stated the subject to be Adultera- tion of Articles of Food,” and not * Adulteration of Food and Drugs.” If, however, “A Disgusted Promoter is really a Fellow of the Institute, and through some extra- ordinary and unfortunate coincidence all the notices, &c., have miscarried in his case, 1 should feel much obliged if he would communicate with me on the subject, and I will endeavour to ascertain the cause. In conclusion, I may say that although the Council welcome open and fair criticism of their proceedings by independent Members, an anonymous letter recommending the Fellows not to pay their subscriptions can scarcely be considered as of that nature.—I am, &c., CuarLes E. Groves, Secretary. Somerset House Terrace, W.C. CRYSTALLISATION OF PHOSPHORUS. To the Editor of the Chemical News. Sir,—Seeing Mr. Whewell’s interesting contribution on farina in the CHEMICAL NEWS (vol. xxxix., p. 97) reminds me of a question I have often wished to ask. Having been now interested for some years in the crystallisation of phosphorus, anthracen, &c.,in vacuo, 1 have eagerly lookec for further details of Mr. Whewell’s experiments (vol XXXViil,, p. 205). Mr. Whewell there states that if the phosphorus is heated and spread over the sides of the tube ‘beautiful colourless crystals’ will be obtained st which will be slightly red.” He also states that having made some of these peculiar crystals he sent them to a well-known mineralogist, who promised to examine them. Is Mr. Whewell in a position now to give us more infor. mation concerning them or even the well-known mineralo- gist’s report.~—I am, &c., GEORGE E. Davis. CHEMICAL NOTICES FROM FOREIGN SOURCES. Nore.—All degrees of temperature are Centigrade, unless otherwit expressed. Comptes Rendus Hebdomadaires des Séances, 'A cadémiede des Sciences. No. 77, February 17, 1879. Researches on Eledric Fishes; Chara&ers of the Discharge of the Gymnotus; Effects of the Dis. charge of the Torpedo Received in a Telephone.— E. J. Marey.—Physiologists have been struck with the analogies presented by a muscle and the apparatus of sle@ric fishes. These two kinds of organs, both subje& ————-

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