— LXXXIX — 



sics ili Illgli Vacua. Magnetic Detection of Mulecular Trajectory. 

 — Laws of Mnonetic Rolation in Hiph and Low Vacua. — Phos- 

 phorogenic Propertios of Molecular Discliarge. — W. Spottiswoo- 

 de and /. Fletcher Moulton. On the Sensitive Stute of Elcctrical 

 Dischar-es tlirough Raicfied Gases. — /. Clerk Maxioell. On Stres- 

 ses inRaiified Gases aiising from Inequalities of Temperature. — 

 W. H. Harlley. Researches on the Action of Organic Substances on 

 the Ultra-Violet Rays of the Spectruin. — /. B. Hannay. On the 

 Microrheometer.— i?. T. Glazehrook. An ExpeiMmental Determina- 

 tion of the Values of the Velocities of Normal Propagation of Pia- 

 ne Waves in different dircctions in a Biaxal Crystal, and a Coin- 

 parison of the Results with Theory. — W. D. Niven. On ceitain 

 Definite Integrals occuring in Spherical Harmonic Analysis and 

 on Ihi' Expansion, in Series, of the Jillipsoid and the Ellipse. — 

 J. E. H. Gordon. On the Specific InJuctive Capacities ofCertain 

 Dielectrics. — W. Kitchen Parker. On the Structure and Deve- 

 lopment of the Skull in the Lacertilia. I. On the SkuU of Ihe 

 Common Lizards {Lacerta agilis, L. viridis, and Zooteca vivipa- 

 ra). — /. Prestwich. On the Oiigin of the Parallel Roads of La- 

 chaber and Iheir Bearing on other Phenomena. — Osborne Rey- 

 nolds. On cei tain Dimensionai Properties of Maffer in the Ga- 

 soons States. I. Expei imoiital Researches on Tliermal Tianspira- 

 tion of Gases tiough Porous Plates, and on the Laws ofTranspi- 

 ration and Iiupnlsion, including aii Expeiimental Proof that Gas 

 is noi a continuons Plenum. II. On an Extensioii of the Dynami- 

 cal Theoiy of Gas, which includes the Stresses, Tangential and 

 Normal, causai hy a varying Condition of Gas, and uffords an 

 Explanation of the Phenomena of Transpiration and Impulsion. 



*Picenlino (II), Giornale della Società economica ed orga- 

 no del Comizio agrario di Salerno. - Ottobre-novem- 

 bre i880. 



^'Politecnico (llj , Giornale dell' ingegnere-architetto civile 

 ed industriale. - Milano, ottobre-dicembre ^880. 



^Polyhiblioìì ; reviif lùblingraphiqve nnìversclle. 



Partie littéraire. - Paris, décembre \ 880. 

 * Procaedings of (he Rnyal Society of Londìn. - Voi. XXIX, 

 n. 197-199 - Voi. XXX, n. 200-203. - 4 879-80. 



