In France, by the decree of 17-22 August 1791 (Article 16), samples were accorded a privileged rate of one-third letter postage, with the reservation that in no case could the postage charged be less than that on a single letter. In 1848, when a low uniform rate for letters was adopted, it was thought that the privilege given to samples need not be continued. The suppression of the special privileged rate was found almost to exclude samples from the mails, and in 1856 they were again given a privilege by the extension to them of the rates and conditions applied to printed matter.[506] The limit of weight for samples was fixed at 3 kilogrammes, and the limit of each dimension at 45 centimetres; but these limits were found to be too great. The post became encumbered with large packets which it could not enclose in the mails, and which, as a matter of fact, it had not the means of dealing with. Consequently, in 1858 the limit of weight was reduced to 300 grammes, and the maximum dimension to 25 centimetres.[507] It was still found, however, that packets of samples gave rise to considerable embarrassment in the service. Their irregular size rendered stamping more difficult, and their volume and the unsatisfactory manner in which they were made up for the post caused inconvenience, especially in the travelling offices, where space is limited. The object in view in establishing the sample rate had been to encourage trade by the distribution of trade samples, and not to found a new general means of conveyance for small parcels. But commercial houses were not slow to take advantage of the means afforded for the distribution of small packages of goods. At first it was made a condition of acceptance at the privileged rate that the articles should bear the name of the dealer or maker, but this precaution was abandoned before long.[508] A minimum rate of 1 centime for packets not exceeding 5 grammes in weight had been fixed in 1856. This proved too low, and in 1871 the minimum was raised to 30 centimes, which proved to be too high. The number of samples, which in 1869 had been 9,751,970, fell in 1872 to 3,461,981.[509] In December 1873 this rate was reduced by one-half, and in August 1875 the rate was fixed at 5 centimes for each 50 grammes. Under this rate the numbers increased rapidly: 5,267,964 packets were sent through the post at the sample rate in 1874, and by 1889 the numbers had risen to 25,731,985. The present rate is 5 centimes per 50 grammes, with a maximum limit of 500 grammes. The number of sample packets in the year 1912-13 was about 78 millions.[510] * * * * * GERMANY Samples were first given a privilege in Prussia in 1825.[511] Packets containing samples were then given single letter rate up to 1-1/2 loth, and half the letter rate for heavier packets. They must either be sent enclosed in a letter or attached to a letter, and the letter must not exceed 3/4 loth in weight.