170 PAVING COMPOSITIONS. 



Claim: The composition. of copal-gum, asphaltum, and coal-tar, alone 

 mixed with crushed stone, ashes, or equivalent material, for the formation 

 of pavements, carriage-ways, and the like, as herein described. 



Stow, Henry M. ; October 11, 1875 ; No. 168,805 ; application filed July 

 20, 1875. — Hard pressed bricks (previously saturated with a composition of 

 90 parts coal-tar pitch, 4 parts kerosene or dead-oil, 4 parts unslaked lime, 

 and two parts sulphur), are laid in such a manner, either on their sides, 

 «dges, or ends, as to leave interstices. The interstices are filled and the en- 

 tire surface covered with broken stone, gravel, or sand, well saturated with 

 pitch, and heavily rolled. On this foundation is spread a composition of 85 

 parts coal-tar pitch, 3 parts dead oil or coal-tar, 8 parts unslaked lime, 4 

 parts sulphur, and sufficient clean sharp sand to bring it to consistency or 

 mortar. 



Claim: 1. A pavement composed of hard-burned bricks placed on an 

 earth foundation, with intervening spaces, cells, or recesses for the top dress- 

 ing to bed into and thereby firmly unite with the brick substructure, and so 

 prevent peeling off, as described and represented. 



2. In a pavement having a hard brick foundation, laid with intervening 

 spaces, cells, or recesses, a concrete top-dressing composed of coal-tar pitch, 

 dead-oil, or coal-tar, unslaked lime, sulphur, and broken stone, gravel, or 

 sand, prepared and applied substantially as herein described and represent- 

 ed. [Drawing.] 



Thormann, J. H. and Brumshagen, P.; August 10, 1875; No. 166,486; 

 application filed July 22, 1875. — This invention relates to that class of con- 

 crete pavements or floors which are laid in sections in imitation of stone 

 flagging, and consists in cementing the sections together with white lead. 



Claim : A pavement or floor composed of concrete flags or blocks, sep- 

 arated by interposed layers of white lead, substantially as and for the pur- 

 pose specified. [Drawing.] 



Tucker, J. C. ; November 16, 1875; No. 170,132; application filed June 

 11, 1875. — Artificial stone. This invention relates to certain improvements 

 on that class of artificial stones described in his patent No. 128,680 and re- 

 issue No. 5,043. 



The present improvement consists in a compound of 70 parts iron-slag, 

 20 parts asphaltum or other bituminous material, and 10 parts animal, veg- 

 etable, or mineral fibre. 



Claim : An artificial stone produced by combining slag with asphaltum 

 or other bituminous material while in a heated state, and with an animal, veg- 

 etable, or mineral fibrous material, in sheet or block, with or without pres- 

 sure, substantially as set forth. 



Von Yersen, F. and Bickel, John ; July 20, 1875 ; No. 165,896 ; applica- 

 tion filed June 24, 1875. — Paving blocks are made of a composition of 25. 

 parts protoxide of iron, 50 parts ferruginous silica, and 25 parts pulverized 

 quartz. The compound is properly tempered with water, and molded into 

 blocks having longitudinal grooves on their edges to receive the cement for 



