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Show THE LARGEST CITIES IN TKE WORLD. 1910 Census data for cities in the United StateB. Official estimates of the British Registrar General and of municipal statistical offices for the European and other American cities. Official estimates for other cities. London 7,429,740 New York 4,766,883 Paris 2,760,033 Tokio, Japan. .2,186,079 Chicago 2,185,283 Berlin 2,106,513 Vienna ..2,085,888 Peking 1,600,000 Philadelphia. .1,549,008 St.Petersburg. 1,620,000 Calcutta 1,009,008 eomtantinoplel,106,'000 Osaka, Japan .1,226,590 Moscow 1,452,100 Buenos Ayres. 1,204,007 Bombay 977,822 Canton 900,000 Hamburg 887,750 Glasgow 884,505 Kio Janeiro ... 842,822 Buda-Pesth . . . 823,215 Tientsin 800,000 Liverpool 767,606 Warsaw 751,595 Manchester ... 716,354 Brussels 704,97 5 Cairo, Egypt.. 704,836 St. Louis 687,029 Boston 670,585 Shanghai 651,000 Bangkok 628,675 Naples 599,000 Sidney 599,000 Milan 597,325 Pome 574,666 Munich 571,000 Birmingham.. 570,113 Amsterdam ... 566,860 Madras 562,191 Cleveland 560,663 Baltimore 558,485 Melbourne 555,750 Madrid 547,000 Dresden 546,400 Barcelona 539,000 Leipzig 535,599 P i t t s b u r g h . . . . 533,905 Marseilles 518,000 Breslau 502,990 Prague 491,481 Leeds 490,985 Sheffield 478,763 Cologne 472,087 Lyons 472,000 Detroit 465,766 Copenhagen... 450,000 Montreal 470,480 Odessa 449,673 Haidarabad... 448,466 Kioto, Japan.. 442,462 Buffalo 423,715 San Francisco 416,912 Rotterdam . . . . 414,491 Dublin 402,928 Yokohama.... 394,303 Turin 391,968 Belfast 391,167 Alexandria.... 391,121 Bristol, Eng... 382,550 Nagoya, Japan 378,231 Kobe, Japan .. 378,197 Milwaukee.... 373,857 Frankfort-on-M 366,283 Cincinnati 364,463 Edinburgh.... 360,276 Lisbon 356,009 Lodz, Poland. 351,570 Newark, N. J . . 347,469 Mexico City .. 344,721 Dusseldorf,... 344,450 Stockholm.... 340,300 New Orleans.. 339,075 Hong K o n g . . . 337,160 Santiago, Chili 332,724 Washington... 331,069 West Ham,Eng 328,585 Riga 321,500 Palermo 321,000 Kieff 319,000 Montevideo ... 316,000 Antwerp 314,135 Havana 302,526 Minneapolis... 301,408 Bucharest 297,843 Bradford 295,865 Nuremberg... 294,426 Hanover, Ger. 289,149 Newcastle 285,951 Stuttgart 280,671 Teheran 280,000 SaoPaulo,Braz. 280,006 Hull 280,000 Genoa 278,000 Chemnitz 276,940 Charlottenburg 274,675 Essen, Ger. . . . 271,208 Jersey City ... 267,779 Nottingham... 266,471 Lucknow 264,049 The H a g u e . . . . 262,621 FAMILIAR FACTS. diSrie?Sytiff «*"* °f a circle mult*ly felej^y.lmi* °f & **" mUltiply d r C™- dJmeSAy^. * *"** ^ ^ SqUare °f y ^ ^ S y i ^ T ^ -Itiplybase by d i a ^ e t e r ^ T ^ * ™ ^ ^ ^ ^ °f o f ^ ^ tCS?S i H a^^e m U l^y C U b e diagonal b y 8 ! ^ ^ ^ *WaTe m u l t i p ly Doubling t h e diameter of a pipe increases its capacity four times. increases its A gallon of water (U.S. standard) weighs 0 l b s . A oz., a n d contains 231 cubic inches. 1 ™ « b i A . « ° ° £ ° f W ^ t e r s t a i n s 7% gallons, 1,728 cubic inches, and weighs 62% pounds. ; A ° ? n d t h - e Pr e s s u r e in pounds per square TihfA U™nf *?*« multiply t h e hei&ht of t h e column in feet by .434. Steam rising from water at its boiling point (212 degrees F.) has a pressure equal to the atmosphere (14.7 pounds to t h e square inch). A standard horse p o w e r : The evaporation of M lbs. of water per hour from a feed water temperature of 100 degrees F. into steam at 'U lbs. g a u g e pressure. To find capacity of tanks any size: given dimensions o f a cylinder in inches, to find its m,,ff?ltiy Vn U-S. g a l l o n s : square the diameter, multiply b y t h e l e n g t h and by .0034. To ascertain h e a t i n g surface in tubular boil- 1 ^ ^uFuy-^ .t h e circumference of boiler by of i n h . i ? f b ° u l e r l n l n c h e s and add to i t t h e area °t all t h e tubes. Pliedhf ^ h ?f t e n s i i e f t r e n g t h of plate mnltf-half +?/ S i c k n e s s of plate and divided by one- PreL™ ?met?TSf. b o i l e r g i y e s safe working L i U r e J 0 L tubular boilers. For marine "oilers add 20 p e r cent, for drilled holes. |