 | 1821 - 454 Seiten
...hole to centre hole. Our rail-way carries 4 tons weight, and has never cost us any thing yet, as to expense of the malleable iron, except creasing. "...with, although it has now been laid eight years. The cast-iron is a daily expense : it is breaking every day." This account was received in the month of... | |
 | Luke Hebert - 1835 - 938 Seiten
...hole to centre hole. Our railway carries four tons weight, and has never cost us any thing yet, as to expense of the malleable iron, except creasing. The...cannot see the least alteration with, although it hat now been laid eight yean. The cast iron is a daily expense ; it is breaking every day." The causes... | |
 | Luke Hebert - 1836 - 942 Seiten
...expense of the malleable iron, except creasing. Tlie iron I cannot see the ¡east alteration trith, although it has now been laid eight years. The cast...iron is a daily expense ; it is breaking every day." The causes of the preservation of malleable iron bars, exposed to the weather, from rust, and their... | |
 | Luke Hebert - 1837 - 236 Seiten
...hole to centre hole. Our railway carries four tons weight, and has never cost us any thing yet, as to expense of the malleable iron, except creasing. The iron I cannot see the least alteration with, alt/tough it has now been laid eight years. The cast iron is a daily expense ; it is breaking every... | |
 | Great Britain. Patent Office - 1873 - 748 Seiten
...early as 1808, but it was not until 1820 that the abolition of cast iron for rail making began to be anything like universal. In that year Mr. Birkenshaw,...rail-making became an established industry. * Some further particulars of the discussion on the value of wrought iron for rails will be found i:, " Wood's Prattical... | |
 | Patent office - 1873 - 738 Seiten
...early as 1808, but it was not until 1820 that the abolition of cast iron for rail making began to be anything like universal. In that year Mr. Birkenshaw,...invention rail-making became an established industry. Although railways, or perhaps properly speaking tramways, were well known prior to 1822,* it was not... | |
 | Maurice W. Kirby, M. W. Kirby - 2002 - 244 Seiten
...Tindal Fell states in a letter received in May 1819:- 'Our Rail- Way carries four tons weight and it has never cost us anything yet, as to the expense...Cast Iron is a daily expense: it is breaking every day.65 These arguments persuaded George Stephenson of the efficacy of wroughtiron rails, not least... | |
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Carlisle was applied to for the results of his experience. He wrote in May 1819, to Mr. Birkenshaw, " Our rails are one and a half " inches square, and stand upon stones about ten inches square, " and are placed at one yard distance from centre hole to... 