„ Wrought │ 34,000│ │ │ 16,000,000 Brass, Cast │ 18,000│ 10,500│ │ 9,170,000 Gun Metal │ 34,000│ │ │ 11,500,000 Phosphor Bronze │ 58,000│ │ 43,000│ 13,500,000 Wood, Ash │ 17,000│ 9,300│ 1,400│ „ Beech │ 16,000│ 8,500│ │ „ Pine │ 11,000│ 6,000│ 650│ 1,400,000 „ Oak │ 15,000│ 10,000│ 2,300│ 1,500,000 Leather │ 4,200│ │ │ 25,000 ──────────────────┴────────────┴────────────┴────────────┴──────────── POWERS, ROOTS, ETC., OF USEFUL FACTORS. _n_ │(1)/(_n_)│ _n_^2 │ _n_^3 │ √_̅n_ │ (1)/(√_̅n_) │ ∛_̅n_ │ (1)/(∛_̅n_) ────────────────┼─────────┼───────┼──────────┼──────┬┴───────────┬─┴────┬──┴───────── π = 3·142 │ 0·318│ 9·870│ 31·006│ 1·772│ 0·564│ 1·465│ 0·683 2π= 6·283 │ 0·159│ 39·478│ 248·050│ 2·507│ 0·399│ 1·845│ 0·542 (π)/(2) = 1·571 │ 0·637│ 2·467│ 3·878│ 1·253│ 0·798│ 1·162│ 0·860 (π)/(3) = 1·047 │ 0·955│ 1·097│ 1·148│ 1·023│ 0·977│ 1·016│ 0·985 (4)/(3)π = 4·189│ 0·239│ 17·546│ 73·496│ 2·047│ 0·489│ 1·612│ 0·622 (π)/(4) = 0·785 │ 1·274│ 0·617│ 0·484│ 0·886│ 1·128│ 0·923│ 1·084 (π)/(6) = 0·524 │ 1·910│ 0·274│ 0·144│ 0·724│ 1·382│ 0·806│ 1·241 π^2 = 9·870 │ 0·101│ 97·409│ 961·390│ 3·142│ 0·318│ 2·145│ 0·466 π^3 = 31·006 │ 0·032│961·390│29,809·910│ 5·568│ 1·796│ 3·142│ 0·318 (π)/(32) = 0·098│ 10·186│ 0·0095│ 0·001│ 0·313│ 3·192│ 0·461│ 2·168 _g_ = 32·2 │ 0·031│1036·84│ 33,386·24│ 5·674│ 0·176│ 3·181│ 0·314 2_g_ = 64·4 │ 0·015│4147·36│ 267,090│ 8·025│ 0·125│ 4·007│ 0·249 ────────────────┴─────────┴───────┴──────────┴──────┴────────────┴──────┴──────────── HYDRAULIC EQUIVALENTS.