286 



Krohn), 1903, (40, mit 1 Taf.). 22 cm. 

 [5210]. 22025 



Wolf, W. Praktiscli brauchbare 

 Unipolarmaschinen fiir hoheie Span- 

 nungen. Berlia, Verb. Ver. Gewerbfl., 

 85, 1906, (400-416). [6060]. 22026 



Neuere Influenzmascbi- 



nen. — Nouvelles machines a influence. 

 — Novel influence machines. [Deutsch, 

 franz. u. engl.] Helios, Leipzig, 10, 



1904, (105-107, 130-137). [6027]. 



22027 



Wolff, Ernst. Das Lanthanspek- 



trum. Zs. wiss. Phot., Leipzig, 3, 1905, 



(395-409). [3030]. 22028 



Wolff, F. A. The so-called inter- 

 national electrical units. London, J. 

 Inst. Electr. Engiu., 34, 1905, (190- 

 228); 35, 1905, (3-42). [.5000]. 



22029 



Wolff, Hermann. Ueber die Mes- 

 Bung des Potentials im electrischen 

 Felde. Zs. physik. Unterr., Berlin, 19, 

 1906, (218-220). [0050 5240]. 22030 



Wolff, Hugo. Noch einmal meine 

 Skiaskopietheorie. Arch. Augen- 



heilk., Wiesbaden, 53, 1905, (135-148). 

 [4410 4470]. 22031 



Ueber die Skiaskopie- 

 theorie, skiaskopische Refractions- 

 messung und iiber mein elektrisches 

 Skiaskopophthalmometer. ( Vorl. Mitth.) 

 Zs. Augenheilk., Berlin, 7, 1902, (213-- 

 217). [4430 4470]. 22032 



Die Skiaskopietheorie 



vom Standpunkt der geometrischen 

 Optik, der Ophthalmoskopie imd en- 

 toptischen Wahrnehmung (entoptische 

 Skiaskopietheorie). Berlin (S. Karger), 



1905, (28). 0,80 M. [4410 4470]. 



22033 

 Wolff, L[udwig! K[arlJ. Demonstrate 

 van bet Ultramikroskoop. [Demonstra- 

 tion de I'ultramicroscope.] Handl. 

 Ned. Nat. Geneesk. Congres, 10, 1905, 

 (118-124). [3082]. 22034 



Wood, Alex. Diurnal periodicity of 

 ionisation of gases. Nature, London, 

 73, 1906, (583). [4250]. 22035 



Wood, A. Spontaneous ionisation of 

 air in closed vessels and its causes. 

 Phil. Mag., London, (Ser. 6), 9, 1905, 

 (550-576). [4275]. 22036 



Wood, G. C. Determination of the 

 speci c electrical resistance of coal, 

 ores, etc. Newcastle, Trans, Inst. 



Min. Mech. Engin., 56, 1906, (27-37) ; 

 Electr. Engin., London, 36, 1905, 

 (232-233). [5660]. 22037 



Wood, R. W. The fluorescence of 

 sodium vapour and the resonance 

 radiation of electrons. London, Proc. 

 Physic. Soc, 19, 1905, (764-778); 

 Phil. Mag. London, (Ser. 6), 10, 1905, 

 (513-525, with pi.). [4230]. 22038 



Fluorescence and Lam- 

 bert's law. Phil. Mag., London, (Ser. 

 6), 11, 1906, (782-788)." [4230]. 22039 



Interference colours of 



chlorate of potash crystals and a 

 new method of isolating heat waves. 

 Phil. Mag., London, (Ser. 6), 12, 1906, 

 (67-70, with 1 pi.). [3610 4205]. 



22040 



Abnormal polarization 



and colour of light scattered by small 

 absorbing particles. Phil. Mag., 



London, (Ser. 6), 12, 1906, (147-149). 

 [4000]. 22041 



Fish-eye views, and 



vision imder water. Phil. Mag., Lon- 

 don, (Ser. 6), 12, 1906, (159-162, with 

 pi.). [3020]. 22042 



The fluorescence, mag- 

 netic rotation and temperature emis- 

 sion spectra of iodine vapour. Phil. 

 Mag., London, (Ser. 6), 12, 1906, (329- 

 336, with pi.). [4230 4205]. 22043 



Fluoresence and magnetic 



rotation spectra of sodium vapour, 

 and their analysis. Phil. Mag., London, 

 (Ser. 6), 12, 1906, (499-524, with 5 pis.). 

 [4230 4208]. 22044 



Apparatus to illustrate the 



pressure of sound waves. Physic. Rev., 

 New York, N.Y., 20, 1905, (113-114, 

 with text fig.). [9030 9320]. 22045 



Intensity of grating 



spectra. Astroph. J., Chicago, 111., 

 21, 1905, (173-175, with text fig.). 

 [3630]. 22046 



The N-rays : arguments 



against their existence. [Reprint.] Sci. 

 Amer. Sup., New York, N.Y., 58, 1904, 

 (24210-24211). [4270]. 22047 



Die Fluoreszenz des 



Natriumdampfes bei Erregung mit 

 monochromatischem Lichte. (Uebers.). 

 Physik. Zs., Leipzig, 7, 1906, (105-106). 

 [4230 4205]. 22048 



Fluoreszenz und Lam- 



bertsches Gesetz, ( Uebers. j Physik. Zs., 



