. Railway maintenance engineering, with notes on construction . Method S-ine Method. Fig. 85.—Definition of Frog Number. the other hand, we find in Vol. 14, Bulletin 7 of the Interna-tional Railway Congress, July, 1900, the following: By a lin 8 crossing, most companies m_ean a crossing whose legs formthe two equal sides of an isosceles triangle whose sides are eight times thelength of the base, and it appears that this is the simplest method ofdescription. (See Fig. 85jB.) * Manual, 1911, p. 85. OTHER TRACK MATERIAL 147 The first definition will give a frog angle of 7° 09 10 fora No.

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. Railway maintenance engineering, with notes on construction . Method S-ine Method. Fig. 85.—Definition of Frog Number. the other hand, we find in Vol. 14, Bulletin 7 of the Interna-tional Railway Congress, July, 1900, the following: By a lin 8 crossing, most companies m_ean a crossing whose legs formthe two equal sides of an isosceles triangle whose sides are eight times thelength of the base, and it appears that this is the simplest method ofdescription. (See Fig. 85jB.) * Manual, 1911, p. 85. OTHER TRACK MATERIAL 147 The first definition will give a frog angle of 7° 09 10 fora No. 8 frog and the second definition gives 7° 10 00. There appears to be some question as to whether it is alto-gether desirable to give the frog angles in seconds on the frog can hardly be built closer than two or three minutes andan impression of accuracy is given that is foreign to the thingswe are deahng with. The use of seconds should, however, beemployed in the calculations of the lead and of the dimensionsof the frog. Table VI shows the propert

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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915