hich is made to assume a convolute form, but a suf- make it a self-acting tilt. The car enters upon IMPROVED VALVE COCK. ficient space is left between the volutions for it, " dumps" itself and returns to a level position the free circulation of air, which is drawn in The annexed figures represent… … light, &c. The above engine will go the same each wheel there is a collar box, having friction valve cock as constructed is very imperfect. closed; it is fitted to the screw, a, on the hoi road as the " water gas light." The learning rollers, and the axles are attached to these col- It is usual to…
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