46 COXNECTICUT GEOL. AND NAT. HIST. SURVEY. [BulL 



187. Lindsley, H. W. 



Building stones and the quarry industry. 

 Census of U. S., loth Rept., x, 126-129, 1880. 



A short description is given of the Connecticut quarries and quarry- 

 regions. The brown and red sandstone quarries at Portland and else- 

 where in the Connecticut valley, granite, syenite, serpentine, and verd- 

 antique marble, are included. 



188. Loomis, I. F. 



The town of Chatham. 



Connecticut Quart., v, 37S-3,77, 1899. 



The old cobalt mine opened at Great Hill in 1762, by John Stephan- 

 ney; worked again in 1770, when ore was shipped to England, Holland, 

 and China. Mine operated by Seth Hunt, 1818-1820; by C. U. Shepard, 

 1844; Edmund Brown, 1850. Ore is arsenical pyrites, containing 80% 

 arsenic, 9% iron, 4/^% sulphur, 4% cobalt, and a trace of bismuth. 



189. Leper, S. W. 



Fossils of the anterior and posterior shales. 

 Geol. Soc. America, Bull., ii, 425-430, 1891. 



Comparison of fauna and flora from different localities of the an- 

 terior and posterior shales sustains the theory of the original continuity 

 of the horizons through all the now faulted blocks of the Triassic for- 

 mation. Localities explored are as follows: Durham, Bluff Head, Higby, 

 Berlin, Southington, East Haven, North Guilford, Stevens, Westfield, 

 South Bloomfield, North Bloomfield. Species found, as follows: Fishes, — 

 Diplurus longicaudatus, Newb. ; Catopterus redfieldi, Egerton; Catopterus 

 gracilis, J. H. Redfield; Ischypterus micropterus, Newb.; Ptycholepis mar- 

 shii, Newb.; Catopterus anguilliformis, W. C. Redfield; Catopterus minor, 

 Newb.; Catopterus ornatus, Newb.; Ischypterus fultus, Agassiz; Ischyp- 

 terus minutus, Newb.; Ischypterus gigas, Newb. Plants. — Otozamites 

 latior, Sap.; Otozamites brevifolius, F. Br.; Loperia simpe.xl, Newb.; 

 Cycadinocarpus chapini, Newb.; Equisetum ( ?) ; Pachyphyllum simile, 

 Newb.; Pachyphyllum brevifolium, Newb.; Clathropteris platyphylla, 

 Brong. ; Baiera miinsteriana, Ung. ; Equisetum rogersi, Sch.; Ctenophyl- 

 lum braunianum, Sch. Some undetermined species both of fishes and 

 plants. 



190. Loughlin, G. F. 



The clays and clay industries of Connecticut. 

 I Connecticut State Geol. Nat. Hist. Surv., Bull. No. 4, 



1-121, 1905. 



The important clay areas of Connecticut are the northern, in the 

 vicinity of Hartford and Windsor, Clayton, Berlin, Quinnipiac, and Mill- 

 dale. The clays are discussed under the following heads: Origin; 

 geological history; chemistry of clays; physical properties of clays; com- 

 mercial classification; composition; properties; and adaptabilities. The 

 clay industries of Connecticut are discussed under the following heads: 

 Prospecting; manufacture of brick; manufacture of pottery; condition 

 of the clay industry. 



