Geology. 367 



tary chemical properties of hydrogen, nitrogen, oxygen, water, 

 etc. These experiments can be performed in a short time with 

 simple, inexpensive apparatus. At the end of each chapter a 

 number of questions taken from recent examination papers are 

 collected. The figures and typography are good, and the mate- 

 rial is interesting and well-selected. h. s. u. 



II. Geology. 



1. Early Cambrian strati grajjhy in the North American Cor- 

 dillera, toith discission of the Albertella and related faunas ; by 

 Lancaster D. Burling. Geol. Surv. Canada, Museum Bull. 

 No. 2, 1914, pp. 93-129. — The writer presents here a good sum- 

 mary of the Lower Cambrian sections, with a view to learning 

 the true position of the Albertella fauna of Canada. Walcott 

 had assigned this to the Lower Cambrian, but Burling, after ana- 

 lyzing the Pioche fauna, finds that, as the latter is made up of 

 two biotas of which the great part is of Middle Cambrian age, 

 the Albertella horizon clearly falls into the Middle Cambrian. 

 Then, too, but a single brachiopod passes from the Lower Cam- 

 brian into the higher division, showing that the two faunas are 

 clearly distinct. Burling is, however, inclined to the view that 

 there is no time break in the best sections, but the evidence as 

 recited by him, especially on page 124, shows that great changes 

 had taken place and that the sections are irregular in character 

 between the Olenellus Pioche fauna and the Albertella biota. 



c. s. 



2. Notes on the Lorraine faunas of New York and the 

 Province of Quebec ; by Aug. F. Foerste. Bull. Denison Univ., 

 vol. xvii, pp. 247-340, pis. I-V, 1914. — This important paper 

 describes a long Upper Ordovician section (over 2500 feet) on 

 Nicolet River, Quebec, and compares it with the strata of the 

 New York Lorraine and equivalent sections on Lake Huron. 

 Fifty-three species are described, of which many are new. G-lyp- 

 torthis is a new brachiopod genus, Pholadomorpha a new 

 bivalve genus, and Ruedemannia a new genus of univalves. 



c. s. 



3. Fauna of the Martinez Eocene of California ; by Rot 

 Ernest Dickerson. Bull. Dept. Geol., L r niv. California, vol. 

 viii, No. 6, pp. 61-180, pis. 6-18, 1914. — In this clearly wrought 

 out paper the author attains the following conclusions: 



" That the Martinez is separated from the Chico (Cretaceous) 

 below and from the Tejon (upper Eocene) above by well-marked 

 unconformities are the principal conclusions from stratigraphic 

 studies. Faunal studies prove that the Martinez fauna of approxi- 

 mately two hundred species is quite distinct from the Chico and 

 the Tejon faunas. The great increase in the fauna makes corre- 

 lation with the lowermost Eocene of the Gulf and Atlantic states 

 more certain. The proposed correlation made in this paper fixes 



