322 BULLETIN OF THE NEW YORK STATE MUSEUM 



hotel." It is built of the rough stone quarried in the vicinity. 

 The brownstone shows signs of exfoliation in some of the 

 older buildings, but not to the serious extent noticeable in 

 other cities. During the past season it has been discolored 

 in shady locations by the growth of the green algae, known 

 specifically as ceratodo7i ptti^puretis. The excessive amount 

 of moisture seems to have favored its growth, and it was 

 particularly luxuriant on the more shaded walls of Massa- 

 chusetts sandstone in Christ church. 



Streets.— Hudson river flagstone is employed generally 

 in sidewalk and curbstone construction on the principal 

 streets. Brick sidewalks are, however, common, owing to 

 their cheapness. For the roadways, cobble stone pavement 

 has an aggregate length of four and one-quarter miles. 

 Belgian blocks are laid on Market street a length of about 

 ^v^ hundred feet, the single example of block pavement in 

 the city. 



Kingston 



The city of Kingston includes Rondout, with Kingston 

 proper. In the former, brick is the principal building mate- 

 rial in the central and business parts of the place ; in the 

 latter there are many old, stone houses, dating back to the 

 eighteenth century, besides newer buildings of stone. Hud- 

 son river blue-stone is used almost exclusively in brick 

 buildings for sills, lintels, caps, steps and trimmings gen- 

 erally. And little stone from outside the Hudson river dis- 

 trict has found its way i'nto construction in Kingston. The 

 best specimen of architecture in stone is the First Reformed 

 church, a massively built structure, and yet of graceful pro- 

 portions — of blue-stone, from quarries at Stony Hollow 

 and Bristol Hill, four miles north of the city. The stone is 

 slate-colored and of uniform shade, and in thin courses gen- 

 erally. The walls are laid with dressed blocks, in broken 

 courses, with trimmings of the same stone. This church 



