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Milk in bags
658
CURRENT TOPICS.
[J. F. I.
radioactivity had left the boron compound and gone with the ammonia. This was taken as proof that the radioactivated boron was identical with nitrogen. When magnesium and aluminum are bombarded, the unstable radioactive forms of silicon and phosphorus are produced respectively. C. Milk in Bags.--If DR. LouIsE STANLEY,Chief of the Bureau of Home Economics, has anything to say about it, people soon will be able to buy skim milk at three cents a quart or less. The Bureau of Dairy Industry has co6perated in testing bags suitable for holding powdered skim milk. A satisfactory container consisted of an outer bag of bond paper and an inner bag made of two layers of glassine, with paraffin between the layers. Dr. Stanley points out that the development of an appropriate container will place dry skim milk, a valuable food product, within reach of many homes. Previously, the lack of a suitable small lowcost container has kept the price of such a semi-perishable product too high for a universal retail market. Dry skim milk lacks only the fat contained in whole milk but contains everything else except the water. It provides the calcium and phosphorus which are among the chief needs of children, it is high in protein, and it is rich in vitamin G, which some authorities believe to be the factor that prevents pellagra. C.
Rosin.--Rosin and other Closely associated products which fall under the category of "Naval Stores," received more than their usual share of attention at the Spring Meeting of the American Chemical Society. The exact origin of rosin is not definitely established. As such it is not present in the gum which exudes from the incisions on the trunks of the pine trees. Rather it is a result of the treatment received by this exudation when being deprived of its contents of pine oil and turpentine. But, the real beginnings of "oleoresin," the sap of the southern pines, the source of naval stores, are not yet discovered by the scientific workers. They know that oleoresin exists within the living pine from its earliest seedling stage. In mature normal southern pine wood the relatively large vertical resin passages are found to number from 6o to 400 per square inch of cross section. They connect intimately with the network of horizontal parenchyma rays, numbering, in slash pine for example, over 20,000 per square inch of tangential surface. The periodic chipping of the pine trees causes the oleoresin to exude freely, whereby it is collected in cups attached to the trees.
CURRENT TOPICS.
[J. F. I.
radioactivity had left the boron compound and gone with the ammonia. This was taken as proof that the radioactivated boron was identical with nitrogen. When magnesium and aluminum are bombarded, the unstable radioactive forms of silicon and phosphorus are produced respectively. C. Milk in Bags.--If DR. LouIsE STANLEY,Chief of the Bureau of Home Economics, has anything to say about it, people soon will be able to buy skim milk at three cents a quart or less. The Bureau of Dairy Industry has co6perated in testing bags suitable for holding powdered skim milk. A satisfactory container consisted of an outer bag of bond paper and an inner bag made of two layers of glassine, with paraffin between the layers. Dr. Stanley points out that the development of an appropriate container will place dry skim milk, a valuable food product, within reach of many homes. Previously, the lack of a suitable small lowcost container has kept the price of such a semi-perishable product too high for a universal retail market. Dry skim milk lacks only the fat contained in whole milk but contains everything else except the water. It provides the calcium and phosphorus which are among the chief needs of children, it is high in protein, and it is rich in vitamin G, which some authorities believe to be the factor that prevents pellagra. C.
Rosin.--Rosin and other Closely associated products which fall under the category of "Naval Stores," received more than their usual share of attention at the Spring Meeting of the American Chemical Society. The exact origin of rosin is not definitely established. As such it is not present in the gum which exudes from the incisions on the trunks of the pine trees. Rather it is a result of the treatment received by this exudation when being deprived of its contents of pine oil and turpentine. But, the real beginnings of "oleoresin," the sap of the southern pines, the source of naval stores, are not yet discovered by the scientific workers. They know that oleoresin exists within the living pine from its earliest seedling stage. In mature normal southern pine wood the relatively large vertical resin passages are found to number from 6o to 400 per square inch of cross section. They connect intimately with the network of horizontal parenchyma rays, numbering, in slash pine for example, over 20,000 per square inch of tangential surface. The periodic chipping of the pine trees causes the oleoresin to exude freely, whereby it is collected in cups attached to the trees.