New Zealand Spinach, Tetragonia expansa, which has come into the American market within recent years, is not related botanically to true spinach.
Atwater, W. O., and Bryant, A. P.: The Chemical Composition of American Food Materials , Bull. 28, Revised, United States Department of Agriculture, Office of Experiment Stations, 1906;.
Daniel, Esther Peterson, and Munsell, Hazel E.: Vitamin Content of Foods , Misc. Pub. 275, United States Department of Agriculture, Bureau of Home Economics,
(June)
1937;.
Stiebling, Hazel K.: The Iron Content of Vegetables and Fruits , Circular 205, United States Department of Agriculture, Bureau of Home Economics,
(February)
1932;.
Sherman, H. C.: Chemistry of Food and Nutrition , ed. 5, New York, Macmillan Company, 1937;.
Lindow, C. W.; Elvehjem, C. A., and Peterson, W. H.: The Copper Content of Plant and Animal Foods , J. Biol. Chem. 82:465 (
(May)
) 1929;.
Ryder, A. E.: The Oxalic Acid Content of Vegetables Used as Greens , J. Home Economics 22:309, 1930;.
Kohman, E. F.: Organic Acids and the Acid-Base Relationship: Oxalic Acid in Foods , J. Am. Diet. A. 10: 100, 1934;.
Nelson, E. K., and Mottern, H. H.: The Organic Acids of Spinach, Broccoli and Lettuce , J. Am. Chem. Soc. 53: 1909 (
(May)
) 1931;.
Karrer, P., and Schlientz, W.: Plant Pigments: LV. The Occurrence of α and β Carotene in Different Natural Products , Helv. Chem. Acta 17: 7, 1934;.
Smith, J. H. C., and Milner, H. W.: Carotene: VII. Physical Properties of Carotenes from Different Plant Sources , J. Biol. Chem. 104:437 (
(Feb.)
) 1934;.
Kuhn, Richard, and Lederer, Edgar: The Separation of Carotene into Its Components: I. The Growth Vitamin , Verhandl. Deutsch. chem. Ges. 64B:1349, 1931;
abstr. Chem. Abstr. 25: 5694, 1931;.
Osborne, T. B., and Wakeman, A. J.: The Proteins of Green Leaves: I. Spinach Leaves , J. Biol. Chem. 42: 1 (
(May)
) 1920;.
Chibnall, A. C.: Spinacin, A New Protein from Spinach Leaves , J. Biol. Chem. 61: 303 (
(Sept.)
) 1924;.
Heyl, F. W., and Larsen, Donald: The Unsaponifiable Fraction from Spinach Fat: II . J. Am. Pharm. A. 22:510 (
(June)
) 1933;.
Heyl, F. W., and Larsen, Donald: The Unsaponifiable Fraction of Spinach Fat: A Glucoside of γ-Spinasterol , J. Am. Chem. Soc. 56: 942 (
(April)
) 1934;.
Winton, A. L., and Winton, Kate B.: The Structure and Composition of Foods , New York, John Wiley & Sons, vol. 2.
Tressler, D. K.; Mack, G. L., and King, C. G.: Factors Influencing Vitamin C Content of Vegetables , Am. J. Pub. Health 26:905 (
(Sept.)
) 1936;.
Ijdo, J. B. H.: Relation Between Soil Condition and the Carotene and Vitamin C Content of Plants, Acta Brevia Neerland , Physiol. Pharmacol. Microbiol. 5:167, 1935;.
Tressler, D. K.; Mack, G. L., and King, C. G.: Vitamin C Content of Vegetables: I. Spinach , Food Research 1:3, 1936;.
Hahn, F. V., and Görbing, J.: Influence of Fertilizers on the Vitamin C Content of Spinach , Ztschr. f. Untersuch. Lebensm. 65: 601, 1933;.
Ranganathan, S.: The Vitamin C Content of Some Indian Foodstuffs , Indian J. M. Res. 23:239 (
(July)
) 1935;.
Wang, Cheng-Fa: The Distribution of Calcium, Phosphorus and Iron in Leafy Vegetables , Chinese J. Physiol. 10:651 (
(Dec. 15)
) 1936;.
Davidson, Jehiel, and LeClerc, J. A.: The Variation in the Mineral Content of Vegetables , J. Nutrition 11:55 (
(Jan.)
) 1936;.
Fellers, C. R.: Vitamin Content of Important Foods in the Child's Diet , Am. J. Pub. Health 25:1340 (
(Dec.)
) 1935;.
Hanning, Flora: A Comparison of Vitamins B and G in Canned Strained Foods , J. Nutrition 8:449 (
(Oct.)
) 1934;.
Hanning, Flora: Further Studies of the Content of Vitamins A and B in Canned Strained Vegetables , J. Am. Diet. A. 12: 231 (
(Sept.)
) 1936;.
Rose, Mary S.: The Foundation of Nutrition , Rev. Ed., New York, Macmillan Company, 1933;.
Fellers, C. R.; DeFelice, D., and Dunker, C. F.: Vitamins A and C in Fresh. Frozen and Canned Spinach , Report before the Division of Biological Chemistry, Meeting of American Chemical Society, September 1936.
Elvehjem, C. A.; Hart, E. B., and Sherman, W. C.: The Availability of Iron from Different Sources for Hemoglobin Formation , J. Biol. Chem. 103:61 (
(Nov.)
) 1933;.
Shackleton, Leslie, and McCance, R. A.: The Ionizable Iron in Foods , Biochem. J. 30:582 (
(April)
) 1936;.
Horwitt, M. K.; Cowgill, G. R., and Mendel, L. B.: The Availability of the Proteins and Inorganic Salts of the Green Leaf , J. Nutrition 12: 237 (
(Sept.)
) 1936;.
Sherman, W. C.; Elvehjem, C. A., and Hart, E. B.: Further Studies on the Availability of Iron in Biological Materials , J. Biol. Chem. 107: 383 (
(Nov.)
) 1934;.
Mitchell, Helen S., and Schmidt, Lola: The Relation of Iron from Various Sources to Nutritional Anemia , J. Biol. Chem. 70: 471 (
(Oct.)
) 1926;.
Levine, Harold; Culp, F. B., and Anderson, C. B.: The Value of Some Vegetables in Nutritional Anemia , J. Nutrition 5:295 (
(May)
) 1932;.
Rose, Mary S.; Vahlteich, Ella McC., and MacLeod, Grace: Factors in Food Influencing Hemoglobin Regeneration: III. Eggs in Comparison with Whole Wheat, Prepared Bran, Oatmeal, Beef Liver and Beef Muscle , J. Biol. Chem. 104: 217-230 (
(Feb.)
) 1934;.
Stearns, Genevieve, and Stinger, Dorothy: Iron Retention in Infancy , J. Nutrition 13: 127 (
(Feb.)
) 1937;.
Schlutz, F. W.; Morse, Minerva, and Oldham, Helen: Influence of Vegetable Feeding upon Iron Metabolism of Infant , J. Pediat. 3:225 (
(July)
) 1933;.
McClugage, H. B., and Mendel, L. B.: Experiments on the Utilization of Nitrogen, Calcium and Magnesium [ill] Diets Containing Carrots and Spinach , J. Biol. Chem. 35:353 (
(Aug.)
) 1918;.
Sherman, H. C., and Hawley, E.: Calcium and Phosphorus Metabolism in Childhood , J. Biol. Chem. 53:375 (
(Aug.)
) 1922;.
Blatherwick, N. R., and Long, M. L.: The Utilization of Calcium and Phosphorus of Vegetables by Man , J. Biol. Chem. 52:125 (
(May)
) 1922;.
McLaughlin, Laura: Utilization of the Calcium of Spinach , J. Biol. Chem. 74:455 (
(Sept.)
) 1927;.
Bloom, Margaret A.: The Effect of Crude Fiber on Calcium and Phosphorus Retention , J. Biol. Chem. 89:221 (
(Nov.)
) 1930;.
Kohman, E. F.: Organic Acids and the Acid Base Relationship: Oxalic Acid in Foods , J. Am. Diet. A. 10: 100 (
(July)
) 1934;.
Kohman, E. F., and Sanborn, N. H.: Calcium Availability in Foods Containing Oxalates.: A Preliminary Report , Indust. & Engin. Chem. 27:732 (
(June)
) 1935;.
Fincke, M. L., and Sherman, H. C.: The Availability of Calcium from Some Typical Foods , J. Biol. Chem. 110:421 (
(July)
) 1935;.
Edelstein, E.; Langer, H., and Langstein, L.: Diet Gemüsekost in der Kinderernahrüng , Deutsche med. Wchnschr. 57: 839 (
(May 15)
) 1931;.
Edelstein, E.: Der Einfluss von Gemüsezulagen auf den Stickstoff und Mineralstoffwechsel des Kindes , Ztschr. f. Kinderh. 52:483 (
(March 14)
) 1932;.
Schlutz, F. W.; Morse, Minerva, and Oldham, Helen: Vegetable Feeding in the Young Infant: Influence on Gastro-Intestinal Motility and Mineral Retention , Am. J. Dis. Child. 46: 757 (
(Oct.)
) 1933;.
Bonner, Priscilla; Hummel, Frances C.; Bates, Mary F.; Horton, J.; Hunscher, Helen A., and Macy, Icie G.: The Influence of a Daily Serving of Spinach or Its Equivalent in Oxalic Acid upon the Mineral Utilization of Children , Report before Division of Biological Chemistry, Am. Chem. Soc., Pittsburgh, 1936;.