. Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, . Fig. 328. FROG WITH WOOD FOOT Fig. 329. FROG WITH IRON FOOT GUARDS. Ordering frogs and switch points or tonguesoften leads to confusion on account of the sectionforeman or clerk not thoroughly understandingwhen they are right or left hand. A good ruleis to stand at the head block and look towards MAINTENANCE OF WAY. 443 OCOCO 6 wo ^ w >^ §! « feo S COCO O< ^ Eh M COO M §§ Q oo 1-1 444 BUILDING AND REPAIRING RAILWAYS. the fro
. Building and repairing railways ... : Forming one of the series of the volumes comprised in the Revised and enlarged edition of The science of railways, . Fig. 328. FROG WITH WOOD FOOT Fig. 329. FROG WITH IRON FOOT GUARDS. Ordering frogs and switch points or tonguesoften leads to confusion on account of the sectionforeman or clerk not thoroughly understandingwhen they are right or left hand. A good ruleis to stand at the head block and look towards MAINTENANCE OF WAY. 443 OCOCO 6 wo ^ w >^ §! « feo S COCO O< ^ Eh M COO M §§ Q oo 1-1 444 BUILDING AND REPAIRING RAILWAYS. the frog; if the frog is on the right hand it is aright hand frog, or if it is on the left hand it is alefb hand frog; the same rule applies to the switchpoints or tongues of a split switch and to thehead blocks of a stub switch. Fig. 330 illustratesa right hand switch and Fig. 331 illustrates aleft hand one. The names of the different partsof a frog and their uses are illustrated by Instructions for taking the angle of a frogare given in Fig. 333. Tables No. 11 and 12, ©^
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1906
