AVRIL, MAI ET JUIN I907 4 1 



Clayton County, 217-307. — Norton. Geology of Bremer County, 323-4o5. — 

 Arey. Geology of Black Hawk County, 4io45a. — Williams. Geology of 

 Franklin County, 407-507. — Macbride. Geology of Sac and Ida County, 5i3- 

 562. — Savage. Geology of Jackson County, 567-648. 



— Minneapolis. The American Geol., XXXVIII, 4, 1907. 



Grout. The Composition of Coals. 225-241. — V. Lewis. Copper Deposits 

 in the New Jersey Triassic, 242-257. — Lincoln. Magmatic Emanations, 258- 

 274. — Penrose. The Premier Diamond Mine Transvaal, South, Africa, 275- 

 284. — Campbell. Improvements in the Utilization of Coal, 285289. — Win- 

 chell. The Oxidation of Pyrite, 290294. 



— New-Haven. The Am. J. ofSc, (V), XXIII, i36, 137, i38. 



i36 : Hobbs. Topographie Features Formed at the Time of Earthquakes 

 and the Origin of Munds in the Gulf Plain, 245-256. — Pirsson and Was- 

 hington. Contributions to the Geology of New Hampshire, 257-276. — x3y : 

 F. Carney. Wave-cut Terraces in Keuka Valley, Older than the Recession 

 Stage of Wisconsin Ice, 325-335. — B. Loomis. Origine of the Wasatch Depo- 

 sits, 356 364. — Howard. The Elm Creek Aerolite, 379-381. — 1 38 : Diller. 

 The Mesozoic Sédiments of Southwestern Oregon, 401-421. — Pirsson and 

 Washington. Contribution to the Geology of New-Hampshire, 433-447. — 

 Weidman. Irvingite a New Variety of Lithia-mica, 45i-454- — Guild. The 

 Composition of Molybdite from Arizona, 455-456. 



— New- York. Science, XXV, 641, 1907. 



6$ 1 : A. W. Slocum. New Processes of taking Impressions of Natural Molds 

 of Fossils. 590-592. — 6Ç3 : Bergen. The Disputed Eruptions of Vesuvius, 

 670. — 644 '• Hill. Geology of the Sierra Almoloya, with notes an the Tec- 

 tonic History of the Mexican Plateau. — 65 1 : Blake. The Flanking Detrital 

 Slopes of the Mountains of the Southwest. 974-978. 



— B. ofthe Mus. ofNat. H., XXII. 1906. 



Whitfield. Jurassic Fossils fram Franz Josef Land, i3o-i34. — Matthew 

 and Gidley. New or Little Known Mammals from the Miocène of South 

 Dakota, i35-i53. — Hay. Two Gênera of Eocene Turtles, 154-190. — Sinclair. 

 Volcanic Ash in the Bridger Beds of Wyoming, 273 280. — Osborn. Tyranno- 

 saurus upper Cretaceous. 281-296. — Matthew. The Continents in Tertiary 

 Times, 353-383. — Gidley. A New Genus of Fossil Horses, 385-388. — Whit- 

 field and Havey. Jurassic Fossils, 389-402. 



— Philadelphie. P. Ac. o/Nat. Se, LVIII, 3, 1906. 



Vaux and William. Observations made in 1906 an Glaciers in Alberta and 

 British Columbia, 568-579. 



— P. Am. Philosophical Soc, XLV, 184, 1906. 



P. Smith. The Paragenesis of the Minerais in the Glaucophane-bearing 

 Rocks of California, 183-242. — T. J. See. The Cause of Earthquakes Moun- 

 tain Formation and Kindred Phenomena connected with the Physics of the 

 Earth, 274-4 14- 



— Washington. Ann. rep. Board of régents Smiths, I., 1905. 



— Ann. Bep. ofthe Smiths, /., 1905, 1906. 



— B. U. S. Geol. Surv., 279, 286, 295, 297, 299, 3o2, 3o3, 3o5- 

 307, 3io, 1907. 



2jg : Butts. Economie Geology of the Kittaning and Rural Valley Qua- 



