76 MISC. PUBLICATION 679, U. S. DEPT. OF AGRICULTURE 



(68) Van Liempt, J. A. M. 



1920. LA DETERMINATION ACIDIMETRIQUE DE l'aCIDE BORIQUE. ReC. deS 



Trav. Chim. des Pays-Bas. 39: 358-370, illus. 



(69) Lubimenko, M. V. 



1927. LES PIGMENTS DES PLASTES ET LEUR TRANSFORMATION DANS LES TISSUS 



vivant de la pl ante. Rev. Gen. de Bot. 39: 619-637, illus. 



(70) Mackinney, G. 



1940. plant pigments. Ann. Rev. Biochem. 9: 459-490. 



(71) - — and Weast, C. A. 



1940. color changes in green vegetables. Indus, and Engin. Chem. 

 32: 392-395, illus. 



(72) Marvel, C. S., and Horning, E. G. 



1943. synthetic polymers, pp. 701-778. In Organic Chem. By H. 

 Gilman, et al. Ed. 2, New York. 



(73) Mayer, F., and Cook, A. H. 



1943. THE CHEMISTRY OF NATURAL COLORING MATTERS. MonOg. Ser. 89, 



354 pp. New York. 



(74) Mestre, H. 



1930. THE INVESTIGATION OF THE PIGMENTS OF THE LIVING PHOTOSYNTHETIC 



cell. Contrib. Mar. Biol. Stanford Univ. pp. 170-187. 



(75) Miller, D. F., and Blaydes, G. W. 



1938. METHODS AND MATERIALS FOR TEACHING BIOLOGICAL SCIENCES. 435 



pp., illus. New York and London. 



(76) Neher, H. T. 



1936. acrylic resins. Indus, and Engin. Chem. 28: 267-271 , illus. 



(77) Noack, K. VON 



1927. DER ZUSTAND DES CHLOROPHYLLS IN DER LEBENDEN PFLANZEN. Bio- 



chem. Ztschr. 183: 135-152. 



(78) Onslow, M. W. 



1925. the anthocyanin pigments of plants. Ed. 2, 314 pp. Cambridge. 



(79) Pechukas, A., Strain, F., and Dial, W. R. 



1943. ALLYL-TYPE CAST RESINS AND LAMINATES. Mod. Plastics 20 (10): 



101-104, 138, illus. 



(80) Perkin, A. G., and Everest, A. E. 



1918. THE NATURAL ORGANIC COLOURING MATTERS. 655 pp. London. 



(81) PORRET, D., AND RABINOWITCH, E. 



1937. reversible bleaching of chlorophyll. Nature [London] 140: 



321-322. 



(82) Powers, P. 0. 



1943. synthetic resins and rubbers. 296 pp. illus. New York and 

 London. 



(83) Pratt, O. B., and Swartout, H. O. 



1930. fruit and vegetable pigments as indicators. Science 71: 486-487. 



(84) Puckett, O. W. 



1940. ETHYL METHACRYLATE AS A MOUNTING MEDIUM FOR EMBRYOLOGICAL 



specimens. Science 91: 625-626. 



(85) 



1941. THE METHACRYLATE PLASTICS AS MOUNTING MEDIA FOR BIOLOGICAL 



materials. Anat. Rec. 80: 453-463, illus. 



(86) Quin, C. W. 



1877. garden receipts. 160 pp. London. (See pp. 82-89.) 



(87) Rabinowitch, E., and Weiss, J. 



1937. reversible oxidation of chlorophyll. Roy. Soc. London, Proc, 

 Ser. A. 162: 251-268, illus. 



(88) Randall, A., and Menzies, A. W. C. 



1941. HISTOLOGICAL SECTIONING OF HARD TISSUES BY A NEW TECHNIQUE. 



Science 93: 189-190. 



(89) Randolph, A. F. 



1937. methyl methacrylate resin. Mod. Plastics 15 (2): 28-29, 60, illus. 



(90) Reinhart, F. W., and Kline, G. M. 



1939. film forming plastics. Indus, and Engin. Chem. 31: 1522. 



(91) Ridgway, R. 



1912. color standards and nomenclature. 43 pp. with 53 col. pl. 

 Washington. 



