468 REPORT ON NATIONAL MUSEUM, 1886. 



length has beeii built down to the bay, where a dock has been erected 

 for the unloading of vessels and for the convenient shipment of the 

 material.* 



New Jersey. — The belt of Silurian slates and shales extending in a 

 northeasterly and southwesterly direction entirely across the northern 

 part of this State includes several quarriable areas, but which have up 

 to the present time been utilized only to a limited extent. Quarries 

 have been worked at La Fayette and Newton, in Sussex County, and also 

 at the Delaware Water Gap in Warren County. The product of these 

 is represented by Professor Cookt as of good quality and suitable not 

 only for roofing material, but also for school slates, tiles, mantels, etc. 



New Hampshire. — Professor Hitchcock states % that the only forma- 

 tion in this State likely to furnish good roofiug slates is the Cambrian 

 range along the Connecticut River. There have been quarries upon this 

 belt in the towns of Littleton, Hanover, aud Lebanon, but they have not 

 now been worked for several years. The stone is stated to be not quite 

 equal to that of Maine and Vermont, but certain portions of it might be 

 utilized locally to good advantage, as for tables, platforms, curbs, and 

 flag-stones. In Littleton the band of rocks suitable for working is nearly 

 an eighth of a mile wide and has been opened at two localities. The 

 strata are vertical and the outcrops on a bill where good drainage can 

 be had to a depth of a hundred feet. The stone is soft, apparently dura- 

 ble, and of a dark-blue color, but does not cleave so thin as the slate 

 from Maine. At East Lebanon the valuable part of the slate bed is 30 

 feet in width. The stone does not split sufficiently thin for roofing, but 

 can be utilized to good advantage for chimney-pieces, table-tops, and 

 shelves ; also for sinks, cisterns, flooring-tiles, etc. The waste material 

 was formerly ground and bolted into slate flour. 



New York. — According to Professor Mather § "The roofing-slate forma- 

 tion of this State ranges through Rensselaer County from 2 miles west 

 of Lebanon Springs to the northeast corner of Hoosic; tbeuce north 

 in Washington County through the towns of White Creek, Jackson, 

 Salem, Hebron, Granville and Hampton; and thence an unknown dis- 

 tance into Vermont." A range of roofing slate supposed to be the same 

 as that of the Hoosic quarries extends also through the towns of Canaan, 

 Austerlitz, Hillsdale, Copake, Aneram, and Puiver's Corners, in Colum- 

 bia County. The most important quarries at present worked are in the 

 towns of Hampton, Middle Granville, Granville, and Salem, in Washing- 

 ton County, and Hoosic, in the northeastern part of Rensselaer County, 

 though there are said to be numerom? promising localities in different 

 parts of the range which have never been opened. Professor Mather 

 estimates the quantity of slate suitable for roofing in the range as above 

 given to be "sufficient to supply a nation's wants for ages." The same 



* Geol. of Michigan, Vol. Ill, Part I, p. 161. 



t Ann. Rep. State Geologist of New Jersey, 1881, p. 00. 



t Geol. of New Hampshire, Vol. Ill, p. 81. 



§ Nat. Hist, of New York, Geology, 1843, part 1, p. 420. 



