660 



Physik. 



9251 Newcomb, S., On the position of the Galactic and other Principal Planes toward 

 which the Stars tend to crowd. Washington 1904. fol. 32 pg. Mark 1 5 » 



9252 PUDDllcazioni del R. Osservatorio di Arcetri. Fascicolo 18. Firenze 1 904. 4. 90 pg 24o 

 CK bettl > A » Oseervazioni astronomiche fatte all'equatoriale di Arcetri nel 1903. 



92o3 ÄCnmiÜ, J., Die Osterfestberechnung auf den Britischen Inseln vom Anfang des 

 4. bis zum Ende des 8. Jahrhunderts. Historisch-chronologische Studie. Regens- 

 burg 1904. gr. 8. 7 u. 95 pg. 2 



9254 Swezey, G. D. f Practical Exercises in Astronomy. New York 1904. 12 13 and 

 327 pg. with figures. cloth. ' 2s(> 



Physik. 



9255 Barrett, W. F., Brown, W., and Hadfield, R. A., Researches on the physical 

 properties of an extensive series of Alloys of Iron. Parts IV and V. Dublin 

 (Scient Trans R D. Soc.) 1904. 4. 18 pg. with 2 plates. lao 



Parts I — III- 1900-02. 82 pg. with 12 plates: M. 7. 



Bavink, B., Beiträge zur Kenntniss der magnetischen Influenz in Krvstallen — 

 siehe Nr. 9228. 



Bottone, S. R. f Radium and all about it — see nr. 9287. 



9256 Chiavassa, F., Contributo alla teoria elementare delle Maree terrestre. Benevento 

 1904. 8. 12 pg. 



Curie, S., Radio-active Substances — see nr. 9290. 



9257 Da Ounha, A., L'Annäe technique (1903 — 1904). Paris 1904. er. in-8 303 d<* 

 av. 142 figures. ' 3 



9258 Ferraris, G., Opere. Pubblicate per cura della Associazione Elettrotecnica Italiana 

 Volume III (ultimo). Milano 1904. in-8.gr. c. tavole e figure 10 



Lopera completa, 3 volumi, 1902-04. c. tavole e fig. M. 30 



Hammer, W., e Hess, A., II Radio ed il Selenio;' proprietä ed applicazioni — 

 vedi no. 9297. 



9259 Hoadley, G. A., Practical Measurements in Magnetism and Electricity. New York 

 1904. 8. 1 1 1 pg. cloth. 3 36(> 



9260 James, J., Die Abraham -Lemoinesche Methode zur Messung sehr kleiner Zeit- 

 intervalle und ihre Anwendung zur Bestimmung der Richtung und Geschwindig- 

 keit der Entladung in Entladungsröhren. Münster 1903. 8. 43 pg. 1 B o 



9261 Kerber, A., Systematische Berechnung sphärisch corrigirter Anastigmatlinsen. 

 Bequemere Formeln zur Berechnung von Anastigmatlinsen. Berlin (Mechaniker) 

 1904. 4. 7 pg. 07g 



9262 Mason, H., Textbook of Static Electricity. New York 1904. 8. 6 and 155 pg 

 with figures. cloth. \,0 

 Mayer, H., Blondlot's N-Strahlen. M.-Ostrau 1904. gr. 8. 31 pg. m. 1 Figur. 1 

 Solan, T., The Telescope. 2. edition, revised and enlarged. New York 1904 



8. 128 pg. with figures. boards. 250 



9265 Pähl, F., Die Entwicklung des physikalischen Unterrichts an unseren höheren 

 Schulen. Theil II. Charlottenburg 190 4. 4. 36 pg. (w 



Theil I. 1902. 30 pg. M. 1.50. 



9266 Richarz, F., Ueber Temperaturänderung in künstlich auf- und abbewegter Luft 

 Marburg 1902. 4. 18 pg. i i0 

 Righi, A., II Radio — vedi no. 9308. 



9267 Schlick, M., Ueber die Reflexion des Lichtes in einer inhomogenen Schicht 

 Berlin 190 4. 8. 49 pg. ^ 



9268 Schwend, K., Zur Zodiacallichtfrage. Schweinfurt 1904. gr. 8. 59 pg. m. 1 Tafel. 2eo 



9269 Transactions of the American Institute of Electrical Engineers. Edited by R W 

 Pope. New York. 8. — Vol. XXI: Year 1904 (10 nrs.). 25 



Correction of advertisement nr. 1292. 



9270 Underhill, C. R., The Electromagnet. New York 1904. 8. 12 and 159 pg. with 

 illustrations. cloth. 7so 



9271 Webster, A. G., The Dynamics of Particles and of rigid, elastic and fluid Bodies. 

 Being lectures on Mathematical Physics. Leipzig 1904. roy. 8. 12 and 588 pe 

 with 172 figures. cloth. 44 



Naturae Novitates. Jahrg. XXVI, No. 23. R. Friedländer & Sohn in Berlin. 



9263 

 9264 



