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NON-METALLIC MINERALS                                                                          109
6)   — All crystals of classes "A", "B" and "C" destined for export
must be packed in wooden cases with a capacity of 45 to 50 ki­lograms those crystals in excess of one kilogram, being mark­ed individually with labels or tickets which denote the weight, class, the names of the exporters, consignees and the number of the order.
7)   — The classification and evaluation form for each lot must con-
tain the number of cases which form the lot, the number and classification of the crystals and names of exporter and con­signee.
8)  — "Lascas" may be shipped in wooden cases or appropriate bags.
Each classification and evaluation form for "lascas" must con­tain the quantity of bags or cases, types of "lasca" in each case or bag, export value, source of product and the names of ex­porter and consignee.
9)   — The exports of rock crystal will only be permitted through the
ports of Rio de Janeiro and Salvador (state of Baia).
16. SALT
The uses of salt are manifold and reach numerous industries in one form or another but the principal may be considered to be the food and the chemical alkali industries. In Brazil, by far the largest use is in the former, within which there are myriad uses. The use in human alimentation is well known. However, there is another which may well be classified in this group, that of the preservation of foods which is carried out to a relatively larger degree in Brazil than, for example, in the United States where freezing is the customary method. Dried beef (xarque) takes up large amounts of salt and is a carryover from former days when it was the most practical method of con­serving and transporting meat. Pickling in brine is also quite common.
Salt as a food for animals is another application for this mineral and in Brazil, it is estimated that one head of cattle requires a normal ration of 60 grams daily which for the total herd of Brazil approximates 750,000 tons an­nually. For purposes of fattening the ideal daily consumption rate is established as .being 80 to 150 grams per cattle. Hogs normally require 30 to 60 grams, horses and mules 30 grams and sheep 1.5 to 2 grams.
Among world producers, Brazil occupies tenth place in importance. The United States is the largest producer and is followed by Russia and Ger­many. In fourth place is China. The exports of Brazil are still of a small magnitude as compared to the leaders Germany, China and Manchukuo and in