weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 53 
388 Iddings (Joseph P.). [Review of u Manual of determinative min- 
eralogy with an introduction on blowpipe analysis," by 
George J. Brush.] 
Jour, of Geol., vol. vi, pp. 757-758, 1898. 
389 See Diller (J. S.), No. 234. 
390 Irving (J. D.). Contact-metamorphism of the Palisades diabase. 
Am. Geol., vol. xxi, p. 398 (£p.); Science, new ser., vol. vii, p. 683 
(i p.), 1898. 
Contains summary of paper read before the New York Academy of 
Sciences. 
J. 
391 Jaggar (T. A., jr.). Some conditions affecting geyser eruptions. 
Am. Jour. Sci., 4th ser., vol. v, pp. 323-333, 1 fig. Abstract, Nature, 
vol. lviii, pp. 261-263, 1898. 
Describes geyser phenomena of the Yellowstone National Park and 
the results of certain experiments. Discusses their bearing on the ques- 
tion of the cause of the various phases of geyser activity. 
392 An occurrence of acid pegmatite in diabase. 
Am. Geol., vol. xxi, pp. 203-213, pi. xiv, 1898. 
Describes rocks from the Boston Basin. 
393 Jefferson (M. S. W.). The postglacial Connecticut, at Turners 
Falls, Massachusetts. 
Jour, of Geol., vol. vi, pp. 463-472, 7 figs., 1898. 
Describes the changes of drainage and the postglacial history of the 
vicinity. 
394 Jennison (W. F.). Manganese deposits of Nova Scotia. 
Federated Can. Mg. Inst., Jour., vol. iii, pp. 167-172, 1898. 
Gives a brief sketch of the manganese deposits of Nova Scotia. 
395 Jones (A. W.). The Mentor beds. 
Kan. Acad. Sci. Trans., vol. xv, pp. 111-112, 1898. 
Describes the general character and occurrence of the beds in the 
Lower Cretaceous and gives a list of fossils. 
396 Jones (Lee fl.). The upper limit of the Knobstone in the region 
of Borden, Indiana. 
Ind. Acad. Sci., Proc, 1897, pp. 257-258, 1898. 
Describes the areal extent of the group in the region. 
397 Jones (T. Rupert). On some Triassic ( ?) Estheme from the Red 
beds or Cimarron series of Kansas. 
Geol. Mag., dec. iv, vol. v, pp. 291-293, 1898. 
Gives brief notes on some specimens. 
398 Jopling (James E.). The Marquette Range. Its discovery, devel- 
opment, and resources. 
Am. Inst. Mg. Engrs., Trans., vol. xxvii, pp. 541-555, figs. 1-11, 1898. 
Includes brief notes on the iron ore bodies and cross sections. 
399 See Birkinbine (John), No. 78. 
