. A manual of marine engineering: comprising the design, construction, and working of marine machinery. 14 7 li 9i 7 8| 104 3i 4 4 „ li 7^ li 10 7^ 91 lU 3| 4 4 „ U 8 1§ lOf 8 10 12 4 T% 4 ., U ^^ 1§ Hi 8i 101 12f 4i 9T7 4 „ 1§ 9 li 12 81 11 13i 4| A 4 „ If 9i Ih 12i 9i Hi 144 4i 1 4 ,, If 10 n 13 91 12^ 141 4i i 4 „ If In the case of the cylinder, it is usual to make the stuffing-boxes, foruniformitys sake, for the low-pressure and medium-pressure piston-rods ofthe same depth as that of the high-pressure rod. The stuffing-boxes of the STUFFING-BOXES AND GLANDS. 153 valve-spindles, too, are us
. A manual of marine engineering: comprising the design, construction, and working of marine machinery. 14 7 li 9i 7 8| 104 3i 4 4 „ li 7^ li 10 7^ 91 lU 3| 4 4 „ U 8 1§ lOf 8 10 12 4 T% 4 ., U ^^ 1§ Hi 8i 101 12f 4i 9T7 4 „ 1§ 9 li 12 81 11 13i 4| A 4 „ If 9i Ih 12i 9i Hi 144 4i 1 4 ,, If 10 n 13 91 12^ 141 4i i 4 „ If In the case of the cylinder, it is usual to make the stuffing-boxes, foruniformitys sake, for the low-pressure and medium-pressure piston-rods ofthe same depth as that of the high-pressure rod. The stuffing-boxes of the STUFFING-BOXES AND GLANDS. 153 valve-spindles, too, are usually exceptionally deep, on account of theirliability to leak, and the trouble of packing them. The packing of thestuffing-boxes in the cylinder-covers of vertical engines is very liable to givetrouble with steam of high-pressure fi-om the want of moisture; the lubricantaffects only the top layers of packing, and keeps them soft, while the bottomones get hard and charred. Metallic packings (v. figs. 31 and 31a) arethe best for use with steam of high-pressure, and although some patent.
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