Miners Pocket book a Reference book for Engineers And Others Engaged in Metal
Miners Pocket book a Reference book for Engineers And Others Engaged in Metal
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In our eReader you can find the full English version of the book. Read Miners Pocket book a Reference book for Engineers And Others Engaged in Metal Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Miners Pocket book a Reference book for Engineers And Others Engaged in Metal
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To quickly assess the difficulty of the text, read a short excerpt:
Which the new shaft g h sunk at d must have in order to reach the same level as the bottom of shaft a b.
4. Or, multiply the sine of the angle of elevation by the hypo- thenuse for the perpendicular, and the cosine of the angle of eleva- tion for the base. Thus in Fig. 41, the shaft a b is 80 yd. Deep, the angles of elevation (in this instance being two, owing to the inequality of the surface) are 39 31' at a, and 15 11' at c, while the hypothenuse a e = 240 yd. , and c d 160 yd. Then Angle a 3...9 31' = sine -636303 X 240 = 152-712720 Angle c 15 11' = sine -261909 X 160 = 41-905440 Total difference of level d e = 194 61816 Add depth of shaft a & =80 Total depth of shaft df = 274-61816 182 MINE SURVEYING SHAFTS.
a *'ig. 39.
MINE SURVEYING SHAFTS. 183 Shafts. To find differences of Level of ', ' 1. At top. The angles of elevation between the two shafts a b and c cZ, Fig. 42, and the hypothenuse being known, their difference of level at the mouth is found in the following way. Suppose the angle of elevation efg = 44 20', and the angle hfi = 10 35', while the hypothenuse gf = 870 yd.
What to read after Miners Pocket book a Reference book for Engineers And Others Engaged in Metal?
You can find similar books in the "Read Also" column, or choose other free books by Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Which the new shaft g h sunk at d must have in order to reach the same level as the bottom of shaft a b.
4. Or, multiply the sine of the angle of elevation by the hypo- thenuse for the perpendicular, and the cosine of the angle of eleva- tion for the base. Thus in Fig. 41, the shaft a b is 80 yd. Deep, the angles of elevation (in this instance being two, owing to the inequality of the surface) are 39 31' at a, and 15 11' at c, while the hypothenuse a e = 240 yd. , and c d 160 yd. Then Angle a 3...9 31' = sine -636303 X 240 = 152-712720 Angle c 15 11' = sine -261909 X 160 = 41-905440 Total difference of level d e = 194 61816 Add depth of shaft a & =80 Total depth of shaft df = 274-61816 182 MINE SURVEYING SHAFTS.
a *'ig. 39.
MINE SURVEYING SHAFTS. 183 Shafts. To find differences of Level of ', ' 1. At top. The angles of elevation between the two shafts a b and c cZ, Fig. 42, and the hypothenuse being known, their difference of level at the mouth is found in the following way. Suppose the angle of elevation efg = 44 20', and the angle hfi = 10 35', while the hypothenuse gf = 870 yd.
What to read after Miners Pocket book a Reference book for Engineers And Others Engaged in Metal?
You can find similar books in the "Read Also" column, or choose other free books by Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 to read onlineMoreLess
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