The daily morning journal and courier., 1895-06-21
The flyers of different Kinds of fish are added. with some slices of ham and a pint of Madeira.
GLASS PAPER,
That Would be More Accurate Designa- tlon Nowadays Than saDdpaper.
 LErnfl the PhilndnlphiA Inquirer.l

That Would be More Accurdte OestBnh'
 tlon Nowadays Than saDdPaper.
 [From tue Philadelphia mquirer.l
 Sandpaper as now made is false to its
 name, for it has no sand about 1t, the place of that material being now taken usually by powdered glass, which does it's work with vastly greater effeet,,.
 One of the most important operations in the fabrication of sandpaper is the pulverization of the glass into powder of the different grades of fineness. Commonly an iron mortar is used for this purpose, a heavy iron pestle being the crushing instrument Stamping
 machinery is better It consists of a stout box, whose iron side walls serve as a base for the stamping machinery. Tn the box, which can be closed by a wooden door to prevent waste of mate rial and also injury to the, workman, are two iron cylinders in which play the stamps. These crush the glass, turn ing on their own axles as they work,
 For grading the powder several shift ing cylinders are necessary, covered with gauge of different mesh. Begin ming with the coarsest the workman proceeds. gradually to the finest, resift- ing each time that which passes through the network
 The paper to be used in the manufac- ture must be good, strong and rather it must also be free from knots and irregularities, and if there be any such they must be planed off. If they should be overlooked they would interfere with the proper use of the sandpaper; the knots would protrude through the glue, and little ridges and channels would result, making it inn possible to smooth off surface evenly with the paper.
 The paper is cut into large sheets, spread on work tables, fastened down, and then painted, by means of a large brush, with a thin, even coat of hot glue. If the glue is too thin and the paper of bad quality, the glue soaks into the paper, so that which remains IS not of sufficient consistency to hold the glass. Thus results a sandpaper from which the glass easily rubs off, or which, in places, has no glass at all, or not enough This is notably the case with the coarser varieties, in which the layer of glue must be put on with ex- ceeding care that the relatively large fragments of glass, which can in no manner be soaked with the binding ma terial, may be held fast in 1t. On the other hand, if the layer of glue is too thick or the conscience too viscous, the outer part hardens too quickly, so that the glass powder cannot embed itself in It.
 When the glue has been spread on the paper the powdered glass must be sift- sd on through an appropriate sieve. This operation also requires considera- ole skill, though not so much as the of the glue. For the glass must not be sifted merely in such a. manner as to use a given quantity to a sheet, but so that each sheet may be I covered evenly. Even then all the pow Ter will not stick, and some of the par icles lie upon others without touching he glue; these can be shaken off by a light movement of the paper When he superfiuous glass powder has been emoved a wooden roller is passed light l y over the paper to press the particles # glass as firmly as possible Into the ,lue and to form perfectly even sur ace.