348 RECORD OF SCIENCE FOR 1887 AND 1888. 



Hatch, Fredeuick H. Oh a Hornblende Hyperstliene Peridotite from Losihva, a 

 low hill iu Taveta District, at tbe S. foot of Kilimanjaro, East Africa. Geol. Mag., 



June, 1888, p. 257. 



Haworth, Erasmus. A contribution to the Arcluvan Geology of Missouri. Am. 

 Geol. Mag., 1888, p. 280. 



Describes the eruptive rocks in tbe vicinity of Pilot Knob and Iron Mountain, 

 Missouri. These consist of (1) grauite, (2) porphyries and porphyrites, (3) dia- 

 bases and diabase porphyrites. The quartzes of tbe granites show often a de- 

 cided approach to an idiomorphic structure and the orthoclases, in places, sec- 

 ondary enlargements. Topaz was found in slides from near the mineral veins. 

 A large share of the rocks is described as quartz porphyries and porphyrites, in 

 some of which occurs the rare manganese epidote piedmontite. 



A contribution to the Archiean Geology of Missouri. Johns Ho])kins Univ. 



Cir., April, 188H, p. 70. 



Hendehsox, G. G. Note on the compositiim of a Carbonaceous Sandstone. Trans. 

 Geol. Soc. of Glasgow, 188fc)-'87-'88, vol. viii, partii, p. 27('). 



Hkrkick, C. L., VV. G. Tight, and H. L. Jones. Geology and Litbology of Michi- 

 picoteu Bay. Results of the Summer Laboratory session t>f 18-^(>. Bull. Soc. 

 Laboratories, Deuisou Univ., 1887, parts 1 and 2, vol. ii,p. 1U>. 



E. S. Clarke, and J. L. Deming. Some American Noryles and Gabbros. 



Am. Geol., June, 1888, p. 3.39. 



Hettneu, a., and G. Linck. Beitriige zur Geologic nnd Petrograijhie der Colnmbia- 

 nischen Auden. Zeitschrift dents, geol. Gesell., XL, Band, 2, Heft, p. 20o. 



HiBSCH, J. E. Ueber eiuige minder bekanute Eruptivgesteiue des bohmischen Mittel- 

 gebirges. Min. u. pet. Mittbeilungen, 9. B., ii., u. iii., pp. 232-262. Six figures in 

 text. 



Hill, E. The Rocks of Sark, Herm, and Jethon. Quar. .Tour. Geol. Soc, No. 171, 

 August, ]888,vol. iLiii, p. 322. 



The principal features are a mass of Archiean gneissoid rocks consisting of 

 qnartz, feldspars, dark green or black hornblende and microscopic apatites and 

 sphenes. This is overlaid by a hornbleudic schist consisting of alternating bands 

 of very pure hornblende and feldspathic material with occasional quartzes. This 

 rock often shows false bedding and is regarded as a possibly metamorphosed vol- 

 canic ash. This in its turn is overlaid by a mass of granitic or syenitic igneous 

 rock. The whole subsequently cut by a series of dikes including quartz-felsite, 

 diabases, and kersantites. 



HiNDE, George Jennings. On the chert and siliceous schists of the Permo-Carbon- 

 iferous strata of Spitzbergen, and on the characters of the sponges therefrom, 

 which have beeu described by Dr. E. vou Dunikowski. Geol. Mag., June, 1888, 

 p. 241. 



On the organic origin of the chert iu the Carboniferous limestone series of 



Ireland, and its similarity to that in the corresponding strata in North Wales and 

 Yorkshire. Geol, Mag., October, 1887, p. 435. 



The paper is largely controversial. The author shows apparently conclusively 

 that the cherts in question are formed mainly from the siliceous residues of 

 sponges. 



HoBBS, William H. Ou the rocks occurring in the neighborhood of Uchester, How. 

 ard County, Maryland. Being a detailed study of the area conqirised in sheet 

 No. 16 of the Johns Hopkins Univ. Circular, April, 1888, p. 69. (A preliminary 

 notice; the full paper, with map and plates, iu course of preparation.) 



Describes the rocks as hypersthene gabbro locally altered into gabbro diorite, 

 olivine hyperite, diorites, pyroxeuite, and granite containing abundant accessory 

 allanite. 



Holland, P., and E. Dickson. Examination of quartzites from Mills Hill, Pontes- 

 bnry. Proc. Liverpool Geol. Soc, 1887-'88, vol. V, part iv, pp. 380-384. 



