452 FORTY—FIRST CONGRESS. Sess. III. Ch. 100. 1871. P•¤¤l*! for Sec. 38. And be it further enacted, That if any person shall counter. oounterfeitm . . . stamps, 0,. v5_ feit, or cause to be counterfeited, any of the marks or stamps required by gillylstzmmlng thrs act, or shall designedly stamp or cause to be stamped falsely any mm 3; mol boiler iron or steel plates, or 1f any person shall stamp or_ mark, or cause 1,;,,,,,,, &,,_ to be stamped or marked, any such iron or steel plates with the name 0;- trade-mark of another, with the intent to mislead or deceive, any such person or persons shall, upon conviction thereof, be fined two thousand dollars, one half to the use of the informer, and may, in addition thereto, at the discretion of the court, be imprisoned not exceeding two years. Afteronc your Sec. 39. And be it futher enacted, That after one year from the pas. 3Q°§,1Q:°Qh';°;f)f1_ spgle of this act, no iron lor steel plies shall be used in the construction struction of bon- o oi ers or steam-vesse s, un ess they ave been inspected in accord- §§;gg>¤§z;*j· ance with the provisions of this act; and the working steam pressure wmging allowable on such boilers when single-riveted shall not produce a strain steam pressure to exceed one sixth of the tensile strength of the iron or steel plates of "“°‘"' 1°• which such boilers are constructed; but where the longitudinal laps of the cylindrical parts of such boilers are double-riveted, and the rivetholes for such boilers have been fairly drilled inste[a]d of punched, an addition of twenty per oentum to the working pressure provided for Pr¤viw· single·riveting may be allowed: Provided, That all other parts of said boilers shall correspond in strength to the additional allowances so made; Safety-v¤iv¤¤· and no split calking shall in any ease be permitted. And every such boiler shall be provided with a good, well—constructed safety valve or valves, of such number, dimensions, and arrangements as shall be pre- _¤€1:m§ scribed by the board of supervising inspectors, and shall also be provided ,,,di°,m,,._ with a sufficient number of gauge-cocks and a reliable low-water indicator that will give alarm when the water falls below its prescribed limits; and in addition thereto there shall be inserted, in a suitable manner, in the hues, crown sheet, or other parts of the boiler most exposed to the heat E Pins ¤f B¤¤¤¤ of the furnace when the water falls below its prescribed limits, a plug of °' good Banca tin, and no boiler to which the heat is applied to the outside · of the shell thereof shall be constructed of iron or steel plates of more Thickness of than twenty-six one-hundredth of an inch in thickness, the ends or heads b°u°” P1‘“°’· of the boilers only excepted, and every such boiler employed on steamera navigating rivers flowing into the Gulf of Mexico, or their tributaries, shall have not less than three inches space between and around its internal ilues; and the feed·water shall be delivered into the boilers in such manner as to prevent it from contracting the metal, or otherwise injuring the mY;*:;:::“_ boilers. And when boilers are so arranged on a steamer that there is hs pipm employed a water-connecting pipe through which the water may pass from one boiler to another, there shall also be provided a similar steam connection, having an area. of opening into each boiler of at least one square inch for every two square feet of effective beating surface contained in any one of the boilers so connected, half the flue and all other fire sur- B $P*¤‘k¤ °¤‘ $1068 b¤1¤§ Computed as effective. And adequate provision shall be made "“°" on all stcamers to prevent sparks or iiames from being driven back from the fire doors into [the] vessel. bgertiialltylforobl SEC- 40- And be it further enacted, That if any pcrson shall l¤t8¤l’l0!1· Mmm: Nitty_ ally load or obstruct, or oansa to be loaded or obstructed, in any way or vnlveggo.; m¤¤¤°}‘» UW Safely-v¤lvo_0f a. boiler, or shall employ any other means or device whereby the boiler may be subjected to a greater pressure than the amount allowed by the certificate of the inspectors, or shall intentionnlly derange or binder the operation of any machinery or device em- . ployed to denote the state of the water or steam in any boiler, or to give w&¤;”g>¤t;f?miE§_ warning of approaching danger, or shall intentionally permit the water to k,,,1Ow_wm,. fall below the prescribed low-water line of the boiler, it shall, in any Such ine of the boiler. 31;:;:: treo: Etogdemtpanoi, anfd any and every person concerned therein, as ty in 1rec y, s all orfe1t_t‘wo hundred, dollars, and may, at the i cre ion 0 the court, be, in addxtton thereto, imprisoned not exceeding five years.
