. Practical mathematics : an elementary treatise covering the fundamental processes of arithmetic, algebra, and geometry, with a practical presentation of logarithms and curve plotting. t Annual Repair Year Efficiency Cost for of Labor Locomotive 1905 55 $2308 1906 82 1677 1907 92 1563 1908 87 1683 1909 93 1243 V- ^ S s „ % -i s^ ±z* \ it i ^ > ± t s \ ii t V t s t \ 3 i s;±~ t \ 4^ X ^T kl_ i V- t \ h it • ii ^- i 1 5r \* ^~ / * \ ^ V ^7 S J? V ^ s 7 \ *- H- S ^ v .7 \ s i-L 3 4 5 6 7FORENOON 1011121 NOON 5 6 7 8 9 10 II 12AFTERNOON *f Fig. 65. Sunday Current Consumption Curve for an Elect
. Practical mathematics : an elementary treatise covering the fundamental processes of arithmetic, algebra, and geometry, with a practical presentation of logarithms and curve plotting. t Annual Repair Year Efficiency Cost for of Labor Locomotive 1905 55 $2308 1906 82 1677 1907 92 1563 1908 87 1683 1909 93 1243 V- ^ S s „ % -i s^ ±z* \ it i ^ > ± t s \ ii t V t s t \ 3 i s;±~ t \ 4^ X ^T kl_ i V- t \ h it • ii ^- i 1 5r \* ^~ / * \ ^ V ^7 S J? V ^ s 7 \ *- H- S ^ v .7 \ s i-L 3 4 5 6 7FORENOON 1011121 NOON 5 6 7 8 9 10 II 12AFTERNOON *f Fig. 65. Sunday Current Consumption Curve for an Electric Road values for the efficiency curve are indicated on the left and for thecost curve on the right. This system will again be used in theWater and Load diagram, Fig. 67. 10. Water Power and Load Curves. In Fig. 67 are shownplotted on the same sheet two curves taken from the power recordof a hydro-electric plant. Curve A is called the head curve, theterm head, referring to the depth of water available to run the waterturbines for the generation of power. The kilowatt curve showsthe number of kilowatts generated at any time during the day or PRACTICAL MATHEMATICS 149 100. 2200 2000 1800 1600 1400 1200 1905 1906 IS 07 /go8 HORiZO/iTAL VALUES FOR CURVES AANDB 1909 Fig. 66. Locomotive Repair Curves, Showing Cost of Repairs and Efficiency of Labor r \ / I \_ \ \ it \ \ I f\ -- v t I * 1 / V - ^ J \ (r, A / V / } ^ T V 3 ^4 -l //J~^>?^-^\ A^ ! ) /£ ^ ,i M/» / / h « /Vx /5^ r/ / i / =^s^ i / \/ \J % 1 / 1 . 1 f KILOWATT CS<? YE B ^ \ / ^—K ~^v /—^ \—^ ^-^ 500 I i ! | | j . ,. ... 1 k» k k ^ 8 12 3 6 FORENOON. 9 12 noon 6 9 12 AFTERNOQH Fig. 67. Power Curves for Hydro-Electric Plant 150 PRACTICAL MATHEMATICS night. The vertical values for the head curve are given at theright and for the kilowatt curve at the left. In rinding the meaning of these curves the first point to benoticed is the rise in the
Size: 1925px × 1299px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectmathematics, bookyear
