LXXXVI — 



Austen. Communications from the Chemical Laboratory of Eutgers College: XIX. — 

 Leffihann and Bearn. The Estimation of the Total Organic Nitrogen in Water by the 

 Kjeldahl Process. 



f Journal (American) of Philology. Voi. IX, 4; X, 1. Baltimore, 1888-89. 



IX, 4. Shorey. The Interpretation of the Timaeus. I. — Haupt. The Dimensions of 

 the Babylonian Ark. — Leanied. The Pennsylvania German Dialect. — Hanssen. Miscel- 

 lanea Graeca. — Platner. Gerunds and Gerundives in the Annals of Tacitus. — X, 1. 

 Kittredge. Launfal. — Hanssen. The Latin Àdjective. — Shorey. The Timaeus of Plato. — 

 Tarbell. The Belation of ipìjcpiofjctTa to vóy.01 at Athens in the Fifth and Fourth Cen- 

 turies B. C. 



f Journal (The american) of science. Voi. XXXVIII, n. 224, 225. NewHaven, 

 1889. 



Langley. Observation of Sudden Phenomena. — Nichols and Franklin. Spectro-pho- 

 tometric Comparison of Sources of Artificial Illumination. — Williams. Possibility of He- 

 mihedrism in the Monoclinic Crystal System, with especial reference to the Hemihedrism 

 of Pyroxene. — Daivson. Earlier Cretaceous Eocks of the Northwestern portion of the 

 Dominion of Canada. — Clarke. A new occurrence of Gyrolite. — Carey Lea. Action of 

 Light on Allotropie Silver. — Kemp. Certain Porphyrite Bosses in Northwestern New 

 Jersey. — Darton. Great lava flows and intrusive trap sheets of the Newark system in 

 New Jersey. — Dwight. Eecent Explorations in the Wappinger Valley Limestones and 

 otlier formations of Dutchess Co., N. Y. — Becker. Sicilie Acid. — Marsh. Notice of Gi- 

 gantic Horned Dinosauria from the Cretaceous. — Id. Discovery of Cretaceous Mamma- 

 Ha. Part II. — Michelson and Morley. Feasibility of establishing a Light-wave as the 

 Ultimate Standard of Length. — Keyes. Carboniferous Echinodermata of the Mississippi 

 Basin. — Barus. Energy Potentialized in Permanent Changes of Molecular Configurations. — 

 Genth. Contributions. to Mineralogy, No. 44. -- Crew. Period of Eotation of the Sun. — 

 Johnson. « Grand Gulf » Formation of the Gulf States. — Trowbridge. Eadiant Energy 

 and Electrical Energy. — Beecher. Note on the fossil Spider, Arthrolycosa antiqua of 

 Harger. — Hobbs. Paragenesis of Allanite and Epidote ad Eock-forming Minerals. — Nason. 

 New locality of the Camptonite of Hawes and Eosenbusch. — Duncan, ÌVilkes and Hutchin- 

 son. Determination of the value of the B. A. Unit of Eesistance in Absolute measure, by 

 the method of Lorenz. — Lea. Properties of Allotropie Silver. — Id. Eing Systems and 

 other Curve Systems produced on Allotropie Silver by lodine. — Mackintosh. Notes on 

 some Native Iron Sulphates from Chili. 



Journal de l'École polytechnique. Cah. LVIII, Paris, 1889. 



Hugoniot. Sur la propagation du mouvement dans les corps, et spécialement dans les 

 gaz parfaits. — Callandreau. Sur le développement en sèrie du potentiel des sphéroi'des 

 de revolution. — Mercadier. Études expérimentales sur l'électricité dynamique et statique 

 des fìls métalliques. 



+ Journal de physique théorique et appliquée. 2 e sér. t. Vili, aoùt-sept. 

 1889. Paris. 



Schwedoff. Eecherches expérimentales sur la cohésion des liquides. — Amagat. Be- 

 cherches sur l'élasticite' des solides. — Bouty et Poincaré. Nouvelle méthode pour la me- 

 sure de la conductibilité des sels fondus. — Poincaré. Sur la conductibilité électrique des 

 sels fondus. — Cailletet et Colardeau. Sur l'état de la matière au voisinage du point 

 critique. — Vautier. Application de la méthode graphique à la mesure de la vitesse d'écou- 

 lement des liquides visqueux par un orificè en mince paroi — Pellin. Béfractomètre de 

 M. A. Dupré. Appareil pour mesurer les indices de réfraction des liquides ou des gaz, con- 



