ON riiK isF. or sroNi; i\ ciiii;s 301 



Some of tlu!sc " X()\a Se-oii;i " sandstones contain sniall 

 noelules (){ |)\Tit('s. which on oxichition [)roclucc stains. 

 I'Lxaniplcs arc to he seen iii h.ast l''ort)'-second street. I)is- 

 coh)ration also is seen in some cases. 



Ohio Sandstone.— Under this head are here included the 

 light-bull and l)luish-gra}', fme-g'rained sandstones, which are 

 quarried in the W'averly group ol th(^ suh-carhonilcrous ''•' 

 formation, in the north-eastern part of the state. The va- 

 rieties known in the New \'ork market are tlu: I^erea. the 

 Amherst anil the h^uclid sandstones. The IJerea sandstone 

 is usualK' of a darker shade of color and less " reed)-" than 

 the Amherst, and is pre-lerred In' kudders here. The Iniild- 

 ing of the Collegiate Reformed church of llarlem, Lenox 

 avenue and ( )ne 1 lundred and d went\'-third street, is one of 

 the best specin^iens ot the I^erea grit. 



The " luiclid bluestone" is seen in the new houses of 

 West Sevent\'-second street ruid west of the boulevard. It 

 has been used to some extent in the fronts of the west side, 

 up-town Idocks of houses, in juxtaposition, with other sand- 

 stones and oolitic limestones. The building on the corner 

 of Barcki)' and ih'oadwa}-, erected in 1S57 is an example of 

 the Amherst stone. 



Dr. Alexis A. |ullen sa\'s of this stone in his chapter on 

 "The dural.)ilit\- of building'" stone in New York cit\' and 

 vicinity." -f " Its rich cont(^nt of ([uartz, said to reach ninet\'- 

 seven per cent, in the butt stone from Aniherst, renders this 

 one of the most [)romisi ng, in regard to durabilitx' of all the 

 freestones of the sandstone class )"et intrcxluced here. Innld- 

 ings constructed of this material in this cit)' since 1857, '''■ ''' 



* show no decay. Init onl\' discoloration. In other in- 

 stances (e. g., rows of houses on Fiftieth street west of 

 Fifth avcmue, on Madison avenue l^etween Thirt\'-fourth aiid 

 Fort\"-third streets, etc.) the blackened discoh^ration and 

 frequent chippings of edges of the soft stone are quite 

 offensive." 



* Report on the Geological Survey of Ohio, Vol. v, p. 57S. 

 t Tenth Census of the United States, Vol. x, p. 369. 



