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20 Molesworth’s pocket-book
Strength and Weight of Materials—continued.
Miscellaneous Substances.
Specific Gravity. Weight of a cubic foot. Weight of a cubic inch. Tensile Strength per eq iu. Crushing Strain per sq. in.
Asphalte 2-5 lbs. 156 lbs. •09 lbs. lbs.
Brick, common from 1-6 100 •057 ——
„ „ • • t0 2 125 •072 —-• ——
„ London stock .. 1-84 115 •066 — •—
„ red 2-16 134 •077 — 808
„ Welsh fire.. .. 2-4 150 •086 —— ■*—
„ Stourbridge fire 2-2 137 •079 1717
Cement, Portland, from 1-6 100 ■046 400 3795
„ .. to 1-76 110 •05 600 5984
,, Roman .. .. 1-6 100 •057 185 •—
Clay 1-9 119 •068 —— •—-
Coal, anthracite .. .. 1-53 95 •055 —•
„ cannel.. .» .. 1‘272 J9 •046 —— ——
„ Glasgow .. .. 1-29 80 •046 . — —
„ Newcastle .. .. 1-269 79 •045 •— •—
Coke .. ■744 46 •026 —— —
Concrete, ordinary .. 1-9 119 •068 —— . -V—
,, in cement .. 2-2 137 •079 —•
Earth .. .. from 1-52 11 •054 •— *—
„ .... .. to- 2-OU 125 •072 —— •—
Glass, flint 3-07» 192 •111 2413 27,500
„ crown .. .. 2-52 157 •091 2546 31,000
„ common green.. 2-528 158 •091 2896 31,876
,, plate 2-76 172 •099 —• ——
Gutta-percha .. .. •966 60 •035 —
Gypsum 2-286 143 •082 71 —
India-rubber .. .. •93 58 •033 —• ——
Ivory 1'82 114 •065 •— —
Lime, quick •843 53 •03 — —
Mortar .. .. from .. 1'38 86 •049 — —
1, • • • • 11) • • 1-9 119 •068 •— —
.. average |l*t 106 ■061 —
Pitch .. .. .. .. 1’15 69 •041 —- —
Plumbago 2-261 , 140 •082 — —
Sand, quartz .. .. 2-75 171 •099 — ——
„ river •• •• jl-88 1 117 •067 — —