514 HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 



10297 KRATSZENSTEIN (Christian Gottlieb; Univ. Copenhagen) THEORIA ELECTRICITATIS 

 MORE GEOMETRICO EXPLICATA ; with vignette and copperplate, 4to. (pp. 70), sewn (rare], 12s Qd 



Hahe Magd. [1746] 



The author was the first to use electricity for therapeutical purposes by applying the spark from a Leyden "jar to cure 

 paralysis of a finger. 



10298 KRATJCH (C.) CHEMICAL REAGENTS ; their Purity and Tests : a new and Improved Text by 

 E. MERCK : Authorised Translation by HENRY SCHENCK, roy. 8vo. buckram, 4s (p. 6s nett) 1907 



10299 The TESTING of CHEMICAL "REAGENTS for PURITY, Authorised Translation by J. A. 



WILLIAMS, F.C.S., and L. W. DUPRE, with Additions and Emendations by the AUTHOR, roy. 8vo. 

 d.,6s(p. 125 Qd) [1902] 



The German edition of this work is now out of print and scarce. 



10300 KREBS (Adolph) LEHRBUCH der INDUKTIONSELECTRICITAT und ihrer ANWENDUNGEN, 

 nebst Sammlung gelb'ster Aufgaben ; with 213 illustrations, roy. 8vo. boards, 3s (p. M. 6 sewn) 



Stuttgart, 1889 



10301 KREBS (Heinrich Johannes) ANFANGSGRUNDE der REINEN MATHEMATIK, II. Theil : 

 GEOMETRIE ; with 17 folding plates, 8vo. calf, 3s Copenhagen, 1778 



10302 KREBS (Leon) TRAiTE"de la FABRICATION des BOISSONS ECONOMIQUES et LIQUEURS de 

 TABLE, Vins, Cidves, Bieres, etc. etc. ; with 8 woodcuts, fcap. 8vo. d., 2s Qd 1887 



10303 KREIDER (Henry R.), and Harry Clary JONES : The DISSOCIATION of ELECTROLYTES 

 in NON-AQUEOUS SOLVENTS as determined by the Conductivity and Boiling-Point Methods, with 

 12 diagrams, roy. 8vo. (pp. 43), sewn, Is Qd [Baltimore, 1911] 



10304 KRETZ (Walter C.) The POSITIONS and PROPER MOTIONS of the PRINCIPAL STARS in the 

 CLUSTER of COMA BERENICES, as deduced from Measurements of the Rutherford Photographs, 

 roy. 8vo. sewn, 3s New York, 1900 



10305 KREUTZ (Heinrich; Univ. Kiel) Uber die BAHN des KOMETEN von 1771, roy. 8vo. (pp. 34), 

 sewn, Is 6d [Wien,]18812 



10306 UNTERSUCHUNGEN Uber d'as SYSTEM der COMETEN 1843 1, 1880 I und 1882 II, III. Theil, 



4to. (pp. 90), sewn, 5s (p. M. 9) nicht im Handel, Kiel, 1901 



10307 KRUEGER (Adalbert) Ueber die PARALLAXE des STERNS LL. 21258: Ueber die PARALLAXE 

 des STERNES OELTZEN No. 17415, 6, 4to. (pp. 18), sewn, with inscr. to J. R. Hind, F.E.S., 3s 



Helsingfors, 1863 



10308 Der STERNHAUFEN h PERSEI : Beobachtungen am Bonner Heliometer, nebst deren 



Berechnung ; with plate, 4to. (pp. 25), sewn, 3s ib., 1865 



10309 KRtJGrER (Julius) VADEMECUM des PRAKTISCHEN PHOTOGRAPHEN, nebst Einleitung: 

 GESCHICHTE der PHOTOGRAPHIE und ihre Theorie vom chemischen Standpunkte u.s.w., 

 3. umgearbeitete Auflage ; with diagrams, post 8vo. cl., 4s Leipzig, 1858 



Including a large number of old recipes. 



10310 KRUGER (Ludwig) BEDINGUNGSGLEICHUNGEN fur LINIENNETZE und fiir RUCKWARTS- 

 EINSCHNITTE ; with 9 diagrams, 4to. boards, 2s Qd (p. M. 4) Potsdam, 1908 



10311 KRUPP (Friedrich ; German steelmaster) EXPERIENCES de TIR de I'ETABLISSEMENT FRIED. 

 KRUFP, exe"cutees au Polygone de Meppen au Mois d'Aofit 1879 ; with very numerous folding 

 plates and tables, 4to. cl., Is Qd Essen [1879] 



10312 KRTJSPER (Stefan v.) THERMOCHRONOMETER, impl. 8vo. (pp. 16), sewn, 2s Budapest, 1873 



10313 KUENEN (J. P.) On the CONDENSATION and the CRITICAL PHENOMENA of MIXTURES of 

 ETHANE and NITROUS OXIDE, with diagrams, 8vo. (pp. 32), sewn, 2s Leiden, 1895 



10314 On the CONDENSATION of a MIXTURE of Two GASES, with diagrams, 8vo. (pp. 16), 



sewn, Is Qd ibidem, 1894 



10315 EXPERIMENTS regarding the ANOMALOUS PHENOMENA near the CRITICAL POINT ; 



with FURTHER EXPERIMENTS, />ate, 8vo. (pp. 29), sewn, 2s ib., 1894 



10316 On the INFLUENCE of GRAVITATION on the CRITICAL PHENOMENA of SIMPLE SUB- 

 STANCES and of MIXTURES, with plate, 8vo. (pp. 19), sewn, Is Qd ib., 1895 



10317 INVESTIGATIONS concerning the MISCIBILITY of LIQUIDS, 8vo. (pp. 8), sewn, Is ib., 1911 



10318 MEASUREMENTS concerning the SURFACE of VAN DER WAALS for MIXTURES of 



CARBONIC ACID and METHYL CHLORIDE : On RETROGRADE CONDENSATION and the CRITICAL 



aux Apprets, etc. etc., 3 e Edition, 8vo. sewn (o. p.), 5s 1858 



The author was the first to prepare soluble or water glass by a wet process, and describes in the^bove work his ' bianc 



fixe ', which he obtained from sulphate of baryta. 

 See al^o FUCHS, No. 8176, ante. 



10320 KUHN (Carl, Miinchen) Ueber die fixen LINIEN im SPECTRUM des SONNENLICHTES ; with 

 folding plate, 8vo. (pp. 16), boards, 4s [St. Petersburg, 1853] 



Interesting as haying been written less than one year before the true meaning of the phenomenon known as ' Frauen- 

 hofer's lines ' was discovered by Kirchhoff. 



10321 KUHNE (Willy; Univ. Heidelberg) ERWIDERUNG auf einen ANGRIFF des Herrn HOPPE- 

 SEYLER, 8vo. (pp. 6), sewn, }sQd [Heidelberg, 1878] 



10322 Ueber das SEKRET des PANKREAS : WEITERE MITTHEILUNGEN iiber VERDAUUNGS- 



ENZYMEiind die VERDAUUNG der ALBUMINE, 8vo. (pp. 10), sewn, 2s [ib., 1876] 



10323 Ueber das VERHALTEN verschiedener organisirter und sog. UNGEFORMTER FERMENTE. 



Ueber das TRYPSIN (Enzym des Pankreas), 8vo. (pp. 10), sewn, 2s [ib., 1870] 



The author's conti ibutions on ferments are of great importance. He first proposed the term enzyme. 



10324 KUNHARDT (C. P.) STEAM YACHTS: their Machinery and Management, with 97 illus- 

 trations, sq. 8vo. d., 5s (p. 16s) New York, 1887 



