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



(21) Williams, F. R. 



1940. drying flowers in three dimensions. Horticulture 18: 280. 



(22) - 



1941. drying flowers in many ways. Horticulture 19: 346, illus. 



(23) 



1943. drying plants in three dimensions. N. Y. Bot. Gard. Jour. 44: 

 138-141, illus. 



PATENTS 



(24) BRUNNER, J., AND SCHEELE, E. 



1926. process of preserving articles. (U. S. Patent No. 1,588,164.) 

 U. S. Patent Office Off. Gaz. 347: 491. 



(25) Fessenden, G. R. 



1938. METHOD OF PRESERVING THE NATURAL COLOR IN PLANT SPECIMENS. 



(U. S. Patent No. 2,105,688.) U. S. Patent Office Off. Gaz. 486: 

 545, illus. 



(26) Gerhart, H. L. 



1942. mounting of specimens and the like. (U. S. Patent No. 2,300,495.) 



U. S. Patent Office Off. Gaz. 544: 59. 



(27) Hill, R. 



1934. resin and resin forming compound. (U. S. Patent No. 1,980,483.) 

 U. S. Patent Office Off. Gaz. 488: 384. 



(28) Kuettel, G.-M. 



1936. process of treating resinous products. (U. S. Patent No. 

 2,044,579.) U. S. Patent Office Off. Gaz. 467: 654. 



(29) - 



1936. preparation of cast resins. (U. S. Patent No. 2,063,315.) U. S. 

 Patent Office Off. Gaz. 473: 348. 



(30) Loder, D. J. 



1936. process of polymerization, (U. S. Patent No. 2,045,660.) U. S. 



Patent Office Off. Gaz. 467: 1046. 



(31) Randolph, A. F. 



1937. organic compound polymerization. Canadian Patent No. 364,561. 



(32) Renfrew, A. 



1938. plastic materials. (LI. S. Patent No. 2,104,760.) U. S. Patent 



Office Off. Gaz. 486: 280. 



