. American engineer and railroad journal . of functions are given on the instrument, amongwhich are logarithms, numbers, squares, square roots, cubes andcube roots, fifth powers and root, sines, tangents, versed sines andsecants. There are several forms of the omnimetre, and themost complete have all of these functions, while the less com-plete, sold at a lower price, have less of them. AND RAILROAD JOURNAL. 417 The omnimetre which is before us is one of the most complete,the price of which is $■), while the other forms cost $2 and § one with which we have experimented is a fine piece ofw
. American engineer and railroad journal . of functions are given on the instrument, amongwhich are logarithms, numbers, squares, square roots, cubes andcube roots, fifth powers and root, sines, tangents, versed sines andsecants. There are several forms of the omnimetre, and themost complete have all of these functions, while the less com-plete, sold at a lower price, have less of them. AND RAILROAD JOURNAL. 417 The omnimetre which is before us is one of the most complete,the price of which is $■), while the other forms cost $2 and § one with which we have experimented is a fine piece ofwork. The disksare very well made and printed and the instru-ment is provided with a transparent arm bearing a fine radialline for the purpose of assisting in the calculations. The oneillustrated is set in such a way as to permit of the multiplicationof a number by 8. It will be noticed that the numeral 1 on theB circle (see the oblique, nearly vertical line at the lower side ofthe engraving) is opposite the numeral 3 of the outer or A. Sextons Omnimetre. circle. To multiply 4 by 3 find 4 on the B circle and oppositeit on the A circle is the answer 12. This is a very simple illus-tration, but it will serve to show the ease with which the instru-ment may be used. Though the processes make use of logarithms,no knowledge of logarithms is required in the use of the instru-ment. The omnimetre is copyrighted by Mr. Thaddeus Norris,of Philadelphia, who has devoted a great deal of careful atten-tion to the arrangement and construction of the instrument, andas far as a few simple calculations can be convincing of its valuethe omnimetre appears to be ^ery satisfactory. It is worthy ofinvestigation. The Railroad Problem. At the three fall conventions of the New York Board of Tradeand Transportation held during the month of October a numberof valuable and interesting papers were read, among which wasone upon The Extension of thePowersof the Interstate CommerceCommission by the Hon. Marti
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
