122 
EXPOSITION AT VIENNA. 
wall tliick enougli to pass inspection, while the thickness 
promotes rapid laying. As a general rule the dimensions 
increase in breadth and length southward, and decrease in 
thickness. For example, a Boston brick is abont 2|- by 3| 
by 7J incbes. In Valparaiso, Chili, they are made 1^ by 
10 by 18 inches. Cuban brick are abont 3|- by 6 by 13 
incbes. New Orleans, 2| by 4|- by 9 inches. Philadel 
phia (common) are usually about 2| by 4 by 8J inches. 
A Philadelphia brick contains about 85.6 cubic inches of 
clay. A Boston, or a Hudson Kiver brick, contains about 
69.12 cubic inches; therefore, twenty-five thousand (25,000) 
Philadelphia bricks have the volume of thirty thousand nine 
hundred and thirty-two (30,932) of the Eastern bricks. 
M. Paul Bonneville, in bis Report upon the Bricks and 
Tiles of the Paris Exposition, 1867, gives the following 
table showing the— 
Dimensions of Bricks of seveml Countries. 
LOC ALIT Y. 
Length. 
Breadth. 
Thickness. 
Volume. 
Burgundy, 
Montereau, 
Larcelles, red, largest, 
Larcelles, red, seoonds, . 
“ Country brick,” Paris, . 
“ Country brick,” Paris, . 
Flemish, 
English, 
English, 
English, 
Holland, 
m. 
0.220 
0.220 
0.220 
0.190 
0.220 
0.220 
0.210 
0.250 
0.238 
0.254 
0.260 
m. 
0.110 
0.110 
0.110 
0.100 
0.110 
0.100 
0.110 
0.110 
0.115 
0.124 
0.120 
m. 
0.060 
0.055 
0.050 
0.045 
0.050 
0.060 
0.047 
0.060 
0.077 
0.076 
0.054 
c. c. 
1,452 
1,331 
1,210 
940 
1,210 
1,320- 
1,085 
1,650 
2,107 
2,400 
1,684 
Experiments made upon Erench brick show that the resist- 
ance to breaking strain ranges from eight kilogrammes the 
square centimetre for ordinary soft brick, to twenty kilo 
grammes for brown Burgundy bricks, which will also bear 
one hundred and ten to one hundred and fifty kilogrammes 
before crushing.