methods do not satisfactorily account for so great a variation in results. Careful tests by the method of Hazura failed t o show the presence of linolenic acid. b u t from the high iodine absorption, some unidentified unsaturated acid appears t o be present. From these experiments we conclude t h a t the oil from the nuts of P i n u s JIonophylLa consists chiefly of the glyceride of oleic acid together with small amounts of the glycerides of stearic, palmitic. lauric and linolic acids. CHEMICALLABORATORS NEVADA RESO
1-NIVEKSITY O F
ANALYSES OF CERTAIN OF THE PACIFIC COAST KELPS’ By
E. G . PARKERA N D J . R . LINDEMUTH Received February 5. 1913
While many kinds of kelp are to be found on both the Atlantic and Pacific coasts, the giant kelps, peculiar t o t h e Pacific coast. are the most important t o the United States from a n economic standpoint because of their size a n d remarkable content of potassium salts. While the other varieties grow from two t o twelve feet in length, the giant kelps are found from 30 t o zoo feet in length, a n d in specific cases much longer. The composition of the Pacific kelps was studied first b y David M. Balch,a of Coronado Beach, California. He analyzed specimens of the giant kelps of the northern and southern Pacific coast of the United States, including .Vereocystis luetkeuna, Macrocystis p y r i f e r a , and Pelagophycus porra. Later in t h e course of an investigation of the fertilizer resources of the United States, under the direction of Dr. Frank I
