In the upper photograph, Dbureau of the French Municipal Police, is seen at work ways occurs on the outer rim of the cartridge, as six o'clock, 'The dent made by' the hammer of the pistol then classified as being "one o'clock" lor "two o'clock," and, making a comparison between the tracings found on the cartridges, it is possible to find out whether a couple of, say, "one o'clock" cartridges were fred' from the same pistol.
Three stages are used in the detec tion of faked whisky from the genuine article. The police have recently been investigating a case of the de-berate copying of a well-known brand of whisky, and in their analy-of the two Bottles, supposedly of the same brand, comparisons were made firstly of the outside covers to the bottles, then of the corks and labels, and Anally of the contents. La examining the labels, it is fairly simple to note any discrepancy in the actual design from enlarged photographs, but the analysis of the contents, which is carried out in the 'Municipal "Laboratory, is not simple. 'The colouring'of the whisky has' to be examined and compared, and other detailed analysis have be made, One. of the principal methods of distinguishing between the faked and the genuine article is to take the weight of the residue from each bottle after evaporation, and compare the two, All of the' well-known brands of whisky approximate very nearly in this respect, while faked whisky shows a very marked difference Hidden Message Revealed Some interesting booklets of photographs illustrating the progress of different investigations were produced and explained. "For instance, a fveage letter, innocent-looking'" enough on the surface, was found after chemical erasion to contain a message written in code language. 'The identi-Aeation bureau were able to decipher the message in the usual method, that of counting up the figures according to the frequency with which they occur in the message, and, applying a known scale, finding out' what let~ ters they represent, On another occasion, the only clue left behind after an armed robbery in the French Concession was a hat and a single hair. The hair led to the eventual capture of the criminal.
Text read from the printed page and cleaned; old type leaves the occasional error.