contact until the teeth reach the position to act fect upon the different pavements. The Nicolson is, in many places, completely honeycombed, the with greatest power upon the incline of the thread, and with the least fric- fire having eaten its way downward into as much of the wood as was tion. By… … which further reduces the friction. more generally adopted. In the in- Mitt 2B The simplicity of the arrangement stances where it has been employéd, is apparent, and we are assured the the results seem to have been very S SV} proprietors will at any time test satisfactory. The wear of heavy their…
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