THIR'I‘Y—SECOND CONGRESS. Sess. I. Ch. 106. 1852. 65 Third, That in subjecting to the hydrostatic test aforesaid, boilers _ Llodo of subcalled and usually known under the designation of high-pressure boilers, J°°*i”€ h??} the inspectors shall assume one hundred and ten pounds to the square gcgyjiostfésrl inch as the maximum pressure allowable as a working power for a new pressureboiler forty-two inches in diameter, made of inspected iron plates at least one fourth of an inch thick, in the best manner, and of the quality herein required, and shall rate the working power of all high-pressure boilers, whether of greater or less diameter, old or new, according to their strength compared with this standard: and in all cases the test applied shall exceed the working power allowed, in the ratio of one hundred and sixty-five to one hundred and ten, and no high—pressure boilers hereafter made shall be rated above this standard: and in subjecting to the test L,,w_,,,,,S,m, aforesaid, that class of boilers usually designated and known as low-pres- boilers. sure boilers, the said inspectors shall allow as a working power of each new boiler a pressure of only three fourths the number of pounds to the square inch to which it shall have been subjected by the hydrostatic test and found to be sufficient therefor, using the water in such tests at a temperature not exceeding sixty degrees Fahrenheit; but should such inspectors be of the opinion, that said boiler by reason of its construction or material will not safely allow so high a working pressure, they may, for reasons to be stated specifically in their certificate, fix the working pressure of said boiler at less than three-fourths of said test pressure, and no low-pressure boiler hereafter made shall be rated in its working pressure above the aforesaid standard: and provided that the same rules shall be observed in regard to boilers heretofore made, unless the proportion between such boilers and the cylinders or some other cause renders it manifest that its application would be unjust, in which cases the inspectors may depart from these rules, if it can be done with safety; but in no case shall the working pressure allowed exceed the hydrostatic 50;,,,, ,,0, t,, test, and no valve under any circumstances shall be loaded or so managed b¤ worked bein any way as to subject a. boiler to a greater pressure than the amount ggjtzdautggcgm allowed by the inspectors, nor shall any boiler or pipe be approved Defect, in which is made in whole or in part of bad material, or is unsafe in its other respects. form, or dangerous from defective workmanship, age, use, or any other cause. Fourth. That when the inspection in detail is completed, and the Csrtmcsts at inspectors approve of the vessel and her equipment throughout, they I°¤P<·¤=l¤>¤- shall make and subscribe a certificate to the collector of the district, substantially as follows : —— State of District of Application having been made in writing by to the subscribers, inspectors for said district, to examine the steamer of whereof are owners, and is master, we having performed that service, now, on this day of A. D. do certify, that she was built in the year , is in all respects staunch, seaworthy, and in good condition for navigation, having suitable means of escape in case of accident from the main to the upper deck, that she is provided with (here insert the number of state-rooms, the number of berths therein, the number of other permanent berths for cabin passengers, the number of berths for deck or other classes of passengers, the number of passengers of each class for whom she has suitable accommodations, and in case of steamers sailing to or from any European port or to or from any port on the Atlantic or the Pacific, a distance of one thousand miles or upwards, the number of each she is permitted to carry,-and in case of a steamer sailing to any other port, a distance of five hundred miles or upwards, the number of deck passengers she is permitted to carry, also the number of boilers, and the form, dimensions, and material of which each boiler is made, the thickness of the metal, and when made —— if made after this act takes effect, and of vox,. x. Pun. —— 9
