19-1 Library [Nov. 



No. 29. J. D. Dana. — On the Origin of Mountains. C S. Hastings, — Comparison 

 of the Spectra of the Limb and of the centre of the Sun, made at the Sheffield Scienti- 

 fic School. J. Trowbridge. — Induced currents and derived circuits. F. II. Bigcloiv. — 

 On a method of measuring induced currents. N. D. 0. Hodges. On methods of 

 determining the resistance of a battery, deduced from Poggendorf's mode of measur- 

 ing Electromotive Forces. 



No. 30. J. D. Dana. — On some results of the Earth's contraction from cooling, 

 including the origin of Mountains and the nature of the Earth's interior. (Continued 

 in No. 31.) 0. A. 



Young. — Note on the use of a diffraction " grating" as a substitute for the train of 

 prisms in a Solar Spectroscope. 



No 31. 0. N. Rood. — A convenient Eye-piece Micrometer for the Spectroscope. 



Hewitson's Exotic Butterflies, Nos. 85 and 86. 



Dr. Pott's Etymologische Forscliungen, Band 4. 



Huxley's Critiques and Addresses. 



I. Administrative Nihilism. II. The School Boards. III. On Medical Educa- 

 tion. IV. Yeast. V. On the formation of Coal. VI. On Coral and Coral Reefs. 

 VII. On the methods and Results of Ethnology. VIII. On some fixed points in 

 British Ethnology. IX. Palasontology and the Doctrine of Evolution. X. Bio- 

 genesis and Abiogeuesis. XI. Mr. Darwin's Critics. XII. The Geneology of Ani- 

 mals. XIII. Bishop Berkeley on the Metaphysics of Sensation. 



Max Miiller's Introduction to the Science of Religion. 



Exchange. 

 The Athenaeum, July, 1873. 

 Nature, Nos. 197—201. 



