650 



NEW YORK STATE MUSEUM 



Tests to determine 

 threes, fours and 

 surfaces 



relative strength of bricks tested singly, in pairs^ 

 fives, set in plaster of paris joints and compressed 



Number 

 in pile 



1 

 1 



2 

 2 

 3 

 3 

 4 



5 

 5 



Might of 

 pile 



Sq. in. 



2.20 

 2.12 

 4.40 

 4.35 

 6.48 

 6.60 

 8.Y5 

 8.88 

 10.95 

 10.85 



Sectional 

 area 



Sq. in. 



28.95 

 29.56 

 29.41 

 29.33 

 29.14 

 29.10 

 29.29 

 29.22 

 28.94 

 29.60' 



Ultimate strength 



Total 

 Pounds 



458 500 

 269 000 

 1Y8 500 

 199 800 

 127 200 

 169 600 

 122 100 

 139 900 

 131 100 

 110 500 



Per square 

 inch 



Pounds 



15 837 

 9 100 

 6 069 

 6 812 



4 365 



5 828 ( 

 4 168 

 4 788 

 4 630 

 3 733 



Average 



Pounds 



12 469 



6 440 



I 



5 096 



4 478 



4131 



Building brick industry in New York state 



Common brick are made at many localities, the most important 

 region being that of the Hudson river valley. 



Pressed brick in plain colors and mottled brick are made by B. 

 Kreischer's Sons at Kreischerville, S. I.; ISTew York architecturaJ 

 terra cotta co., jSTew York city; Eastern hydraulic pressed brick co., 

 Canandaigua; while plain brick are manufactured by the Glens 

 Falls brick and terra cotta co., Glens Falls; the Corning brick co., 

 Coming; Brush and Schmidt, Jewettville; Campbell brick co.,,. 

 is'^ewfield. 



Enameled brick. These have a very extensive use^ at tlie present 

 day, specially for the interior of buildings, where a smooth surface 

 is often desirable, but one which shows a variety of color. The body 

 of enameled brick usually consists of a hard burned fire clay, or 

 semi-fire clay, the surface of which is covered by a glaze of one 

 color. Two difficulties with which the manufacturer of enamel 

 brick has to contend are the production of a perfectly flat surface of 



