— XX1I1 — 



the possibility of transit observation without personal error. — Pelers. Observations of comets. — 

 Walcoll Gibbs. On complex inorganic acids. — Marsh. Characters of coryphodontidae. — ■ Id. Cha- 

 racters of odontornithes. — Id. New and gigantic dinosaur. — N. 80 .Draper. Discovery of oxygen in the 

 sun by photography and a new theory of the solar spectrum. — Lea. Action of certain organic substances 

 in increasing the sensitiveness of silver haloids. — Le Conte. Criticai periods in the history of the 

 earth and their relation to evolution. — Wachsmulh. Notes on the internai and esternai structure 

 of paleozoic crinoids. — Alien. Chemical constitution of hatchettolite and samarskite. — Dana. Re- 

 lations of the geology of Vermont to that of Berkshire. — Langley. A proposed new method in solar 

 spectrum analysis. — Koenig. Note on the exactitude of the french normal fork. — N. 81. Wrighl. On a new 

 process for the electrical deposition of metals, and for constructing metal-covered glass specula. — 

 Gheney and fìichards. A new and ready method for the estimation of nickel in pyrrhotites and mat- 

 tes. — Wachsmulh. Notes on the internai and external structure of paleozoic crinoids. — Le Conte. 

 Phenomena of binocular vision. — Mixler. Ethylidenargentamine-ethylidenammonium nitrato. — Dana. 

 On the crystalline form of the hydrous and anhydrous varieties of ethylidenargentamine-ethylidenam- 

 monium nitrate. — Id. The relations of the geology of Vermont to that of Berkshire. — Draper. On 

 the preparation of cylinders of zirconia for the oxy-hydrogen light. — Dana. Occurrence of garnet 

 with the trap of New Haven. — Smith. Description of the Rochester, Warrenton, and Cynthiana me- 

 teoric stones, with some remarks on the previous falls of meteorites in the sanie regions. — Grin- 

 nell. Notice of a new genus of annelids frum the lower silurian. — Marsh. New vertebrate fossils. — 

 N. 82. Dana. On the relations of the geology of Vermont to that of Berkshire. — Galton. Address beforo 

 the departement of anthropology of the British Association at Plymouth. — Gard. Analyses of cast 

 nickel, and experiments on the combining of carbon and silicon with nickel. — Sars. On the prac- 

 ti cai use of autography , especially for naturai history publications. — Glarke. On the jodates of 

 cobalt and nickel ; some specific gravity determinations ; and an analysis of sylvanite from Colo- 

 rado. — Sloane. Notes on the analysis of bituminous coal. — Goode. A preliminary catalogue of the 

 reptiles, fishes and leptocardians of the Bermudas, with descriptions of four species of fishes belic- 

 ved to be new. — Pengelly. History of cavern exploration in Devonshire, England. — N. 83. Marsh. Intro- 

 duction and succession of vertebrate life in America. — Dana. Note on the Helderberg formation 

 of Bernardston , Massachusetts, and Vernon, Vermont. — Pengelly. History of cavern exploration in 

 Devonshire, England. — Warring. Is the existence of growt-rings in the early oxoge, nons plants 

 proof of alternating seasons. — Mallet. On sipylite, a new niobate, from Amherst County, Virginia. — 

 Newcomb. Mean motion of the moon. 



tArnerican Social science Association. Collection of casts subieets selected for the 

 girls ecc. — Handbook for immigrants to the U. S. — Free public librarie?. — 

 Several occasionai papers. New York. 

 tAmtliches Verzeichniss des Personals imd der Studenten der Universitat Strassburg fur 



das Winter-Halbjahr 1876-77. Strassburg, 1876. 8." 

 tAnkundigung der Vorlesungen im 1877-78 auf der gross. bad. Albert-Ludwigs- 



Hochschule zu Freiburg im Breisgau gehalten. Freiburg, 1877. 4." 

 +Anualen der Physik und Chemie. Neue Folge 1877 n. 5-10. Leipzig, 1877. 8.° 



N. 5. Knoblauch. Ueber die Reflexion der Wàrmestrahlen von Metallen. — Clausius. Ueber die 

 Behandlung der zwischen linearen Stromen und Leitern stattfindenden ponderomotorischen und 

 electromotorischen Kràfte nach dem electrodynamisehen Grundgesetze. — Pareau. Ueber die Dampf- 

 spannungen bei der Dissociation krystallwasserhaltiger Salze. — Winkelmann. Ueber die Tempera- 

 turcoefficienten der Warmeleitung von Luft und Wasserstoff. — Hetwig. Ueber Bewegungserscheinungen 

 an electrisirtem Quecksilber in Glasgefàssen. — Braun. Ueber Abweichungen vom Ohm'schen Gesetz 

 in metallisch leitenden Korpem. — Riecke. Zur Theorie der unipolaren Induction und der Pliicker'schen 

 Versuche. — Pape. Die Warmeleitung im einundeingliedrigen Kupfervitriol. — Lommel. Beraerkungen 

 ùber die Polarisation des Regenbogens. — Gerland. Zur Geschichte der Erfindung des Araometers. — 

 li iwnhauer. Die Bedeutung der Rhomboeder- und Prismenfliichen am Quarz. — Clausius. Nachtrà- 

 gliche Bemerkung. — N. 6. Edlund. Ueber die electrischen Stroine, welche bei dem Stromen der 



