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42 THE LOCOMOTIVE. [March, Ml ^^^'3 HARTFORD, MARCH 15, 1893. Itt. J. M. Allen, Editor. A. D. Risteex, Associate Editor. The Locomotive can he obtained free by calling at any of tlie company^s agencies. Svbseription price 50 cents per year ichen mailed from this office. Bound volumes one dollar each. (Any volume can he supplied.) Papers thai borrow cuts from us will do us a favor if they will mark them plainly in returning, so that we may give proper credit on our books. The report for 1892 of the chief engineer of tlie Sachsischer Danipfkessel-Revis- ions-Vcrein of Chemnitz is at hand. DrRixG the past month there have been several changes in the addresses of our general agents. Our patrons will note that Mr. H. M. Lemon has been appointed general agent in the northw^ern department. ^Messrs. Zollars & ]\IcGrew of Denver have removed to Rooms 433 to 426 in the Mining Exchange building ; Mr. R. F. Manly of Birmingham, Ala., has removed to the Morris building in that city, and our Boston manager, Mr. C. E. Roberts, has removed to the new Telephone building. No. 125 ]Milk st. On page 38 of the present issue a brief account is given of an explosion near Kansas City, 3Io. It appears that the engineer (who was killed) had reason to think an explosion was imminent, and started promptly to haul his fire. One of the papers from Avhich we obtained our information says that "Hunt, instead of making his escape, recklessly endeavored to draw the fire from under the boiler, and while he was thus engaged the explosion took place. It blew out the front of the boiler and shot Hunt's body high into the air." Xow we should think that Mr. Hunt ought to be regarded as a sort of hero, rather than as a reckless fellow. He anticipated an explosion, and his plain duty was to haul his fire as quickly as he could. He did not shrink frort. his duty and unhappily he was killed. He knew he was taking his life in his hands, and it would be a graceful act for our esteemed contemporary to give him credit for his bravery. On the Strains Caused by Cold Feed Water. In a recent issue of The Locomotive some reference was made to the strains produced in boiler shells by the chilling action of cold feed-water, when this feed w ater is discharged directly against the hot plates. These strains are often more severe than even experienced engineers might think, and many of the so-called " mysterious " accidents are doubtless due to this cause, either directly or indirectly. We have seen abundant evidence of the destructive action of feed-water when discharged against the shell directly, and in the present article we propose to show by calculation how great these strains from temperature changes may be. The general principle upon which the calculation is based is as follows : If a bar of metal be cooled by a given amount, it contracts and becomes shorter. Now after it has shortened, suppose we put it in a testing machine and stretch it back to its original
1898. J T 11 E L O C (J M O 11 V i: Iciif^tli. 'I'lic force rrquirt'd to stretch it in tliis inaiincr is (Mjiial lo tlie force tliiit w 1 should have hud to exert in order to prevent it from coiitracliii
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Page 8 and 9: ~\; -^ A .
Page 10 and 11: ^ rtE.'pTWE © (§) THE LOCOMOTIVE.
Page 12 and 13: THE LOCOMOTIVE. [January, a o o M -
Page 14 and 15: 6 THE LOCOMOTIVE. [January. In both
Page 16 and 17: 3 THE LOCOMOTIVE. [Januahy, been em
Page 18 and 19: ^Q THE LOCOMOTIVE. [January, ])rove
Page 20 and 21: 42 THE LOCOMOTIVE. [January, Sit «
Page 22 and 23: 14 THE LOCOMOTIVE. [January. After
Page 24 and 25: 16 TlIK hOCOMO'J'i Vi.. Incorporate
Page 26 and 27: 18 THE LOCOMOTIVE, [Februaky, stren
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Page 34 and 35: 26 THE LOCOMOTIVE. [February, injur
Page 36 and 37: 28 THE LOCOMOTIVE. Pit *0tiim$tlt
Page 38 and 39: 30 THE LOCOMOTIVE. [February, jured
Page 40 and 41: 32 Incorporated 1866. THE LOCOMOTIV
Page 42 and 43: 34 THE LOCOMOTIVE, [March, pressure
Page 44 and 45: 36 T II E L () C O yi O T l\E. [Mar
Page 46 and 47: 38 'i^il^ LOCOMOTl V i:. [Makcu, (1
Page 48 and 49: 40 THE LOCOMOTIVE. [March, art & Co
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Page 54 and 55: ^(3 THE LOCOMOTIVE. [March, power o
Page 56 and 57: 48 Incorporated 1866. THE LOC (J MO
Page 58 and 59: 50 THE L O C O 31 U T I ^' E , [Apr
Page 60 and 61: 52 THE LOCOMOTIVE. [April, (This is
Page 62 and 63: 54 THE LOCOMOTIVE. [April, Castle,
Page 64 and 65: 56 THE LOCOMOTIVE. [April, sious ar
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Page 68 and 69: ,60 THE LOCOMOTIVE. L-^p«il, nortl
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Page 72 and 73: 64t Incorporated 1866. THE LOCOMOTI
Page 74 and 75: 66 THE LOCOMOTIVE. [May, much as we
Page 76 and 77: 68 THE LOCOMOTIVE. [May, diameter o
Page 78 and 79: 70 THE LOCOMOTIVE. [May, by tirlce
Page 80 and 81: 72 THE LOCOMOTIVE. [May, Boiler Exp
Page 82 and 83: 74 THE LOCOMOTIVE. [May, HARTFORD,
Page 84 and 85: 76 THE LOCOMOTIVE. [Mat, weeks amou
Page 86 and 87: '^8 THE LOCOMOTIVE. [Ma\% coat-tail
Page 88 and 89: 80 Incorporated 1866. THE LOCOMOTIV
Page 90 and 91: 82 THE LOCOMOTIVE, [June,
Page 92 and 93: 84 THE LOCOMOTIVE. [June, Boiler Ex
Page 94 and 95: 86 THE LOCOMOTIVE. [June, (105.)
Page 96 and 97: 88 THE LOCOMOTIVE. [June, The Heliu
Page 98 and 99: go THE LOCOMOTIVE. [JrxE, Mkt Elttt
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92 THE LOCOMOTIVE. [June, ills lett
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•94 THE LOCOMOTIVE [June, .21 ia
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96 Incorporated 1866. THE LOCOMOTIV
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98 THE LOCOMOTIVE. [July, worked ov
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: ^QO THE LOCOMOTIVE. [July, Inspec
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102 THE LOCOMOTIVE. [July, (132).
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104 THE LOCOMOTIVE. [July, " The am
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106 THE LOCOMOTIVE. [July, tttSttlt
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-iQQ THE LOCOMOTIVE. [July, and als
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110 THE LOCOMOTIVE. [July without t
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112 THE LOCOMOTIVE. [July. Incorpor
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114 THE LOCOMOTIVE. [August, to whi
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116 THE LOCOMOTIVE. [August, tion.
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118 THE LOCOMOTIVE. [August, (147.)
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-120 THE LOCOMOTIVE. [August, A lar
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•J22 THE LOCOMOTIVE. [August, git
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124 THE LOCOMOTIVE [August, hard en
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126 THE LOCOMOTIVE. [August, The Bu
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128 THE LOCOMOTIVE. [August. Incorp
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^30 THE LOCOMOTIVE. [September, pau
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132 THE LOCOMOTIVE. [September,. iu
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-[34 THE LOCOMOTIVE. [September, Fi
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136 THE LOCOMOTIVE, [September, .35
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138 THE LOCOMOTIVE, [September, add
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140 THE LOCOMOTIVE lSeptember, On a
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d42 THE LOCOMOTIVE. [September, cas
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144 Incorporated 1866. THE LOCOMOTI
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146 THE LOCOMOTIVE. [Octobek, in pl
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i48 THE LOCOMOTIVE. [October, Natur
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[50 THE LOCOMOTIVE. [October, Curti
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•152 THE LOCOMOTIVE. [Octobeb, an
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^54 THE LOCOMOTIVE. [Octobeb, Mkt e
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-[56 THE LOCOMOTIVE. [October, Tlie
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158 THE LOCOMOTIVE. [October, Of co
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162 THE LOCOMOTIVE. [November, that
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: 16^4 THE LOCOMOTIVE. [XOVEMLER, I
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166 THE LOCOMOTIVE. [November, boil
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168 THE LOCOMOTIVE. Sit Ktttmttit c
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170 THE LOCOMOTIVE. [November, KILL
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172 THE LOCOMOTIVE [November, Boile
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174 THE LOCOMOTIVE. [:November, sel
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178 THE LOCOMOTIVE. [December, grap
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: 180 THE LOCOMOTIVE. [December, In
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^82 THE LOCOMOTIVE. [December, that
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184 THE LOCOMOTIVE. [December, HART
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186 THE LOCOMOTIVE. [December, The
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188 THE LOCOMOTIVE [Decembeb, angle
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190 THE LOCOMOTIVE. [December, Such
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i92 Incorporated 1866. THE LOCOMOTI
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INDEX, Equivalent of heat, redeterm
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