. The street railway review . e, isattracting considerable attention abroad. The receipt is this: Mix one litre ( quarts) ofpetroleum, 150 grams ( ounces) of triturated soap, 10per cent of resin, and 333 grams ( ounces) of causticsoda. Heat and stir until solidification begins, say 40minutes. If the mixture tends to boil over, pour in a fewdrops of caustic soda. Pour the semifluid mass intomoulds, and place in a hot or drying room for 10 or 15minutes. Then remove and cool. M. Maestracci recom-mends the addition of 20 per cent of sawdust and 20 percent of clay or sand to the origin
. The street railway review . e, isattracting considerable attention abroad. The receipt is this: Mix one litre ( quarts) ofpetroleum, 150 grams ( ounces) of triturated soap, 10per cent of resin, and 333 grams ( ounces) of causticsoda. Heat and stir until solidification begins, say 40minutes. If the mixture tends to boil over, pour in a fewdrops of caustic soda. Pour the semifluid mass intomoulds, and place in a hot or drying room for 10 or 15minutes. Then remove and cool. M. Maestracci recom-mends the addition of 20 per cent of sawdust and 20 percent of clay or sand to the original mixture. Trials ofthese bricks are said to have developed three times asmuch heat as ordinary coal brick and leave no some change in furnaces, it is expected that thebricks will develop four times the heating power of coal,and specially adapted to street car heating. The Oakland, California, Consolidated Electric Rail-way Company has concluded to do away entirely withthe pass system, and no more will be The Remscheid (Germany) tramways, finished in1893, have been in successful commission since. It is anoverhead, single track, side pole system.
Size: 2124px × 1177px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
