. Mining and Scientific Press . DOWN 30°SLOPE •s \^* <5v %* FIGURE //. UP 30° SLOPE MINING AND SCIENTIFIC PRESS November 19, 1921 may prove successful underground. The four - rsmanufactured and sold by Sauerman Bros, of Chicago,shown in Pig. 1. were design. .1 in stop »li*ririni» as soon ill. and quite probably may be adapted to under-The Le Clair scraper is somewhal similar t le of the designs of scraper sold l>y tie i; idman Mfg. i o. for loading coal underground. A descriptionof the Goodman apparatus was given by Mr. Gow in hisarticle referred to above, and in the Goodman Mfg. ha
. Mining and Scientific Press . DOWN 30°SLOPE •s \^* <5v %* FIGURE //. UP 30° SLOPE MINING AND SCIENTIFIC PRESS November 19, 1921 may prove successful underground. The four - rsmanufactured and sold by Sauerman Bros, of Chicago,shown in Pig. 1. were design. .1 in stop »li*ririni» as soon ill. and quite probably may be adapted to under-The Le Clair scraper is somewhal similar t le of the designs of scraper sold l>y tie i; idman Mfg. i o. for loading coal underground. A descriptionof the Goodman apparatus was given by Mr. Gow in hisarticle referred to above, and in the Goodman Mfg. handl k. Although the hoe type of scraper is suitable for nearlyall kinds of material, in its design account should betaken of the conditions under which it will have to work. most important considerations are the angle of thecutting-edge, the weight of the bail, and the point ofattachment of the haulage-rope. The maximum will be obtained when the angle of the digging lies in the resultant of the pull and the force ofgravity. It would seem simple to dete
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