Factory and industrial management . r hori-zontal stripes extending entirelyacross the water glass. If theprotective apparatus is used witha non-reinforced glass, the wa-ter glass should be enclosedin a coil of steel wire millimetres in diameter. It will notinterfere in the least with the reading of the level, and in caseof explosion of the tube will prevent flying particles from breakingthe outside glass. The type B protector is of the same constructionas the type A, except that the interior is painted entirely white, thescale which is colored and transparent being on the outside wall oft
Factory and industrial management . r hori-zontal stripes extending entirelyacross the water glass. If theprotective apparatus is used witha non-reinforced glass, the wa-ter glass should be enclosedin a coil of steel wire millimetres in diameter. It will notinterfere in the least with the reading of the level, and in caseof explosion of the tube will prevent flying particles from breakingthe outside glass. The type B protector is of the same constructionas the type A, except that the interior is painted entirely white, thescale which is colored and transparent being on the outside wall ofthe water glass. The interior of the apparatus being enameled whitewill reflect light on the water glass, and will show up very clearlythe water contained in the glass. The narrow colored scale placedon the \jack of the water glass will impart a tint to the entire massof water, while above the water in the empty part of the glass, thescale will appear as a narrow strip. Finally, in the small intermediate hall of the museum there are. FIG. 14. WATER GAUGE WITH AUTO-MATIC SAFETY VALVES. THE PARIS MUSEUM OF SAFETY DEVICES. 225 found, among other things, six show-cases in which the Associationparisienne des proprietaires dappareils a vapeur have brought to-gether a large number of specimens of defective parts of steam boil-ers illustrating interior corrosion, exterior corrosion, scales, pocketsformed by overheating, various kinds of cracks in the shell and in therivet seams, incrustations, damaged fire tubes and water tubes, collection is of great interest to practical operators. This is notthe first service that the above mentioned society has rendered to theFrench engineers; their purpose is to prevent accidents and explo-sions of boilers, and to teach economy in the production and use ofsteam. Their means of action n iii consists in maintaininga bureau of inspectorswho inspect boilers andauxiliary apparatus; inmaintaining a bureau ofsteam experts who givetheoretical and
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
