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The Iron Age 1885-07-02: Vol 36 Iss 1

1885 Reed Business Information US

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eS Tie, The Iron Age NDEX TO™ READING MATTER PAGE 38, A Published every Thursday Morning by Davin WILLIAMs, Review of the Vol. XXXVI: No. 1 No. Hardware, Iron and Metal Trades. 83 Reade Street, New York. Entered at the Post Office, New York, as N. sp ¥i ork, T hursday, July 2, 188 i. INDEX TO ADVERTISEMENTS PAGE 25 Second-Class Matter, $2.50 a Year, Including Hostage. Single Copies, Ten Cents. Caleulating Machines. Calculating machines are of two kinds— the automatic and the semi-automatic. The former, though capable of producing as- tounding results, are exceedingly expensive, and have never had an extended applica- tion. The latter have been known in one form or another for many years, and are employed by actuaries, insurance companies, electricians and many others who have long and tedious arithmetical calculations to work out. They are all based upon the use of the ‘stepped reckoner” invented by the Earl of Stanhope between the years 1775 and 1780. This device is illustrated on this page, and, as it forms the foundation of all those machines, it is worth while to describe it at some length, as when its action is un- derstood the details of any form of arithmom- eter may be comp…

Citation

The Iron Age 1885-07-02: Vol 36 Iss 1. Reed Business Information US. 1885.