temperature, and to limit the stress on the rods. In it is also much easier to secure. More- straight lines I reckon about four abut- over, a solid rod with welded ends can be made so that the ends, where sup- ment posts per mile. In the short South American line, ported, are, to some extent,… … may be said to-night that the problem of of 'the road ; this undercutting allows the continuous line, whether straight, much greater freedom of rolling than curved, rigid, or flexible, has been com- would be compatible with the horizontal pletely solved. Drawings and specifica- gripping wheels,…
Engineering
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