Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
On The Testing And Strength Of Railway Materials, &C
recorded , we learn that in 1863 , 173 experiments ivere made on the compression of bricks . We can only give the mean results , as the cubical contents , dimensions , and maximum or minimum results would occupy too much of our space . Gault bricks , which ivere used on the Bermondsey branch of the works , showed : —Average pressure ivhen the specimen first showed signs of giving , at 13-380 tons and 12- 120 tons ; and pressure ivhen finally crushed , average , 37-90 tons and 32-38 tons . Messrs . Allan ' s ( Sudbury ) Suffolk bricks , used for the pumping Station at Deptford , showed ;— -Average pressure when giving signs of breaking to he 4 " 475 tons and 17-100 tons ; and average pressure ivhen crushed 31-75 tons and 4345 tons . The following bricks , ivhich we select fro m this table , were used on the Southern Outfall contract : —
Pressure ivhen Weight . first showed ™ ssme when signs of giving fina % erushed lb . — average in ~ average in tons . tons - BrimstoneSuffolks ( Allan ) 6-8 5 . 100 31-00
, Best Whites ( Allan ) 6-6 5-100 19-60 No . 3 Suffolks ( Allan ) 64 4-000 19-10 Best whites ( Salters , Chilton ) 6-3 5 " 300 25-90 ' No . 2 Suffolks ( Salters , Chilton ) ... 7-1 6-600 33-20 Gault ivire-cut , No . 2 ( Webster , Burham ) ... 54 6-400 32-90 Gault , pressed No . 1 ( Webster , Burham ) ... 6-1 7-400 36-80
Gault ( Betts , Aylesford ) 6-4 7-300 32-40 Best reds ( Stares , Fareham ) 6-3 8-420 26-10 Best rubbers ( Stares , Farehani ) 8-8 1-400 15 . 70 Best firebricks ( Pearson , Stourbridge ) 7 ' 3 15-600 62-80-No . " 2 Salmon ( Ambrose , Colchester ) 6 " 5 8-900 36-70 No . 2 Suffolks ( Knight , Woodbridge ) 6 T S'SOO 37-30 Good stocks ( Smeed , Sittingbourne ) 5-3 5-700 33-90 Best blue ( Gilbert , Tipton ) 8 ' 0 21-600 965-20 *
* This specimen withstood the utmost pressure of the testing press . Eighty-tivo other experiments were also made in 1859 and 1860 , on the compression of bricks ; and in the same years , thirty-eight experiments were made on the strength of various kinds of bricks , & c . From the tables recording these experiments ive select the following items ;—Mr . Gilbert ' s blue bricks gave the total crushing ( ) at 50-00 tonsand
power average , 75-00 tons , the crushing power per square inch being 4 , 0141 b . and 3 , 2001 b . Mr . Cliff ' s fireclay brick—total crushing power ( average ) 65-62 tons and 37-50 tons , the crushing power per square inch being 4 , 2181 b . and 2 , 4011 b . Machine bricks , red , manufactured by Mr . Piatt—total crushing power ( average ) 28-12 tons and 18-74 tons ; crushing power per square inch 1 , 6671 b . and 1 , 6191 b . The folloiving were the results of some blue bricks by three different makers : —Mr .
Taylor , crushing poiver , 50-60 tons ; ditto , square inch , 2 , 9151 b . ; Mr . Gilbert , crushing power , 75-00 tons ; ditto , square inch , 4 , 7591 b . ; Mr . Cliff , Wortley Works , Leeds , crushing power , 72-00 tons ; ditto , square inch , 4 , 6391 b . Mr . Helling ' s clay bricks showed a " total crushing poiver ( average ) 26-00 tons , and a crushing power per square inch of 1 , 5741 b . These experiments are , of course , ivith the best made bricks , selected b y the makers for the purpose . We need hardly say that the common bricks now so plentifully used in running up houses in London could not stand a pressure anything approaching that to which some of the varieties mentioned above were subjected .
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
On The Testing And Strength Of Railway Materials, &C
recorded , we learn that in 1863 , 173 experiments ivere made on the compression of bricks . We can only give the mean results , as the cubical contents , dimensions , and maximum or minimum results would occupy too much of our space . Gault bricks , which ivere used on the Bermondsey branch of the works , showed : —Average pressure ivhen the specimen first showed signs of giving , at 13-380 tons and 12- 120 tons ; and pressure ivhen finally crushed , average , 37-90 tons and 32-38 tons . Messrs . Allan ' s ( Sudbury ) Suffolk bricks , used for the pumping Station at Deptford , showed ;— -Average pressure when giving signs of breaking to he 4 " 475 tons and 17-100 tons ; and average pressure ivhen crushed 31-75 tons and 4345 tons . The following bricks , ivhich we select fro m this table , were used on the Southern Outfall contract : —
Pressure ivhen Weight . first showed ™ ssme when signs of giving fina % erushed lb . — average in ~ average in tons . tons - BrimstoneSuffolks ( Allan ) 6-8 5 . 100 31-00
, Best Whites ( Allan ) 6-6 5-100 19-60 No . 3 Suffolks ( Allan ) 64 4-000 19-10 Best whites ( Salters , Chilton ) 6-3 5 " 300 25-90 ' No . 2 Suffolks ( Salters , Chilton ) ... 7-1 6-600 33-20 Gault ivire-cut , No . 2 ( Webster , Burham ) ... 54 6-400 32-90 Gault , pressed No . 1 ( Webster , Burham ) ... 6-1 7-400 36-80
Gault ( Betts , Aylesford ) 6-4 7-300 32-40 Best reds ( Stares , Fareham ) 6-3 8-420 26-10 Best rubbers ( Stares , Farehani ) 8-8 1-400 15 . 70 Best firebricks ( Pearson , Stourbridge ) 7 ' 3 15-600 62-80-No . " 2 Salmon ( Ambrose , Colchester ) 6 " 5 8-900 36-70 No . 2 Suffolks ( Knight , Woodbridge ) 6 T S'SOO 37-30 Good stocks ( Smeed , Sittingbourne ) 5-3 5-700 33-90 Best blue ( Gilbert , Tipton ) 8 ' 0 21-600 965-20 *
* This specimen withstood the utmost pressure of the testing press . Eighty-tivo other experiments were also made in 1859 and 1860 , on the compression of bricks ; and in the same years , thirty-eight experiments were made on the strength of various kinds of bricks , & c . From the tables recording these experiments ive select the following items ;—Mr . Gilbert ' s blue bricks gave the total crushing ( ) at 50-00 tonsand
power average , 75-00 tons , the crushing power per square inch being 4 , 0141 b . and 3 , 2001 b . Mr . Cliff ' s fireclay brick—total crushing power ( average ) 65-62 tons and 37-50 tons , the crushing power per square inch being 4 , 2181 b . and 2 , 4011 b . Machine bricks , red , manufactured by Mr . Piatt—total crushing power ( average ) 28-12 tons and 18-74 tons ; crushing power per square inch 1 , 6671 b . and 1 , 6191 b . The folloiving were the results of some blue bricks by three different makers : —Mr .
Taylor , crushing poiver , 50-60 tons ; ditto , square inch , 2 , 9151 b . ; Mr . Gilbert , crushing power , 75-00 tons ; ditto , square inch , 4 , 7591 b . ; Mr . Cliff , Wortley Works , Leeds , crushing power , 72-00 tons ; ditto , square inch , 4 , 6391 b . Mr . Helling ' s clay bricks showed a " total crushing poiver ( average ) 26-00 tons , and a crushing power per square inch of 1 , 5741 b . These experiments are , of course , ivith the best made bricks , selected b y the makers for the purpose . We need hardly say that the common bricks now so plentifully used in running up houses in London could not stand a pressure anything approaching that to which some of the varieties mentioned above were subjected .