I'ETKn(!KAIM[Y. 343 



Tkall, J. J. II. On till' "I'igin of certiiiu hiiiulcd Gneisses. Geol. Miig., November, 

 1887, p. 484. 



Couteuds tliiit the gueissic rocks of the Lizard District (the graiuilitic series of 

 Profes.sor Boiiiiey) are of igueoiis origin, and owe their bantled structure to dy- 

 namic agencies. 



{(i) IJKI.ATING TO METHODS OF WOItK. 



BecKK, F. Uiiterscheidnng von Qiiar/ nnd Feldspath in Diinnschliffen mittelst Fiir- 

 bung. Min. und pet. MittluMlnngen, Zebnter Band, i. Heft, 1H88, j). 90. 



Treats the uncovered section witii hydrolliioric acid. Quartz isdissolved, whibi 

 the feblsparis convert(!d into an aniorplions lluosilicate of alumina. This, when 

 treated with aniline, absorbs the color, while the (juartz remains clear. 



McMaiion, C. a. On a mode of using the Quartz-Wedge for estimating the strength 

 of the Double Refraction of Minerals in thin slices of rock. Geol. Mag., Decem- 

 ber, 1888, p. 548. 



Smektii, AV. F. Apparatus for separating the mineral constituents of rocks. Sci. 

 Proc. Roy. Dub. Soc, May, 1888, vol. vi, pp. r)8-G0. 



On a method of determining the specific gravity of substances in the form 



of powder. Sci. Proc. Roy. Dub. Soc, May, 1888, vol. vi, p. 61. 



Strkng, a. Ucber einigij mikrosjMsch-cbemische Reaktiouen. Neues Jahrb. Min., 

 Geol., etc., 1888, ii. Band., 2. Heft, p. 142. 



(e) MISCELLANEOUS. 



Adams, Frank, and A. C. Lawson. On some Canadian Rocks containing scapolite, 

 with a few notes on Rocks associated witli the Apatite Deposits. C;inadian Rec- 

 ord of Sci., No. 4, 1888, vol. in, pp. 18G-201. 



AUGE, M. Note sur la Bauxite, son origine, sou tlgo et son importance gYsologiquo. 

 Bull. Soc. G6ol. de France, 1888, ;M series, vol. xvi, p. :54r), No. i"). 



Bailey, W. S. Notes on the microscopical examinations of rocks from the Thunder 

 Bay Silver District. Rep. Geol. and Nat. Tfist. Survey of Canada, 1887, Appendix 

 I, pp. 115 H to 122 H. 



Summary of Progress in Mineralogy and Petrography in 1887. From monthly 



notes in the American Naturalist. 



Summary of Progress in Mineralogy and Petrography in 1888. From monthly 



notes in the Am. Naturalist. 



These summaries are issued by Mr. Bailey in pamphlet form , -it the end of <!ach 

 year; they consist of the same notes published by him monthly in the .Vmericau 

 Naturalist, and form a A'cry essential i)art of tin* literature to those not having 

 access to many of the periodicals and other publications. 



On some peculiarly spotted rocks from Pigeon Cove, Minnesota. Am. Jour. 



Sci., May, 1888, pp. 388-;}'j:"!. 



Bertkand, Marcel. Sur la distribution gcographicine des roches eruptives en Eu- 

 rope. Bull. Soc. G6ol. de France, 1888, Hd series, vol. xvi. No. 7, p. 573. 



Beyer, Otto. Der Ba.salt des Grossdehsaer Berges und seine Einschliisse sowio 

 iihuliche vorkommnisse ans der Oberlansitz. Min. und pet. Mittheiluugeu, x. 

 Band, i. Heft, p. 1. One plate with eight figures showing micro-structures. 



Blake, J. F. On the occurrence of Glaucopiiane-bearing Rock in Anglesey. Geol. 

 Mag., March, 1888, p. 125. 



On the Monian System of Rocks. Quar. Jour. Geol. Soc, No. 175, August, 



1888, vol. XLlv. p. 46:5. 



Bonney, T. G. The foundation stones of the earth's crust. Nature, Novenil)er 22, 

 1888, p. 89. 



Note on the structure of the Ightham Stone. Geol. Mag., .July, 1888, p. 297. 



Nottis on a part of the Hnronian series in the neighborhood of Sudbury (Can- 

 ada). Quar. Jour. Geol. Soc, No. 173, February, 1888, vol. xliv, p. 32. 



