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The Iron Age 1886-01-14: Vol 37 Iss 2

1886 Reed Business Information US

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AND LES. » quote the any ocher ice list. ire. wents of extension. it is both useful and accurate. lute test it had better be abandoned. wakesbift at best. e lron Age READING MATTER A Review of the Hardware, Iron and Metal Trades. AOVERTISEMENT Published every Thursday Morning by Davin Wriuurams, No. 83 Reade Street, New York. Entered at the Post Office, New York, as Second-Class Matter, Vol XXXVIL No. 2. Tne Microscope in the Workshop.* It is a sound principle of mechanical con- truction that a secondary tool should never be used when the work can be as well done 1y a primary tool. If the capacity and the ficiency of the primary tool can be increased so as to meet every requirement, it is better to dispense with the secondary tool alto- ether. In the ordinary operations of the workshop the lathe and the planer are the primary tools, while the caliper with the rraduated scale is the secondary tool. Let is take the most simple case. It is required to turn down a piece of metal to a given liameter. In order to make the assumed ase as simple as possible we will assume the | The | required diameter to be an even inch. aliper is set for this unit of length, either from a graduated scale …

Citation

The Iron Age 1886-01-14: Vol 37 Iss 2. Reed Business Information US. 1886.