132 



AGRICULTURE HANDBOOK VU, U.S. DEPT. OF AGRICULTURE 



(101) SCHUETTE, H. A., and SCHUETTE, S. C. 



1935. MAPLE SUGAR: A BIBLIOGRAPHY OF EARLY 

 RECORDS. Wis. Acad. Sci., Art.s Letters 

 Trans. 29: 209-236. 



(102) SHENEMAN, J. M., and COSTlU)W, R. N. 



1959. IDENTIFICATION OF MICROORGANISMS FROM 

 MAPLE TREE TAPHOLES. Food Res. 24; 146- 

 151. 



(103) COSTILOW, R. N., ROBBINS, p. W., and DOUG- 

 LASS, J. E. 



1959. CORRELATION BETWEEN MICROBIAL POPU- 

 LATIONS AND SAP YIELDS FROM MAPLE 

 TREES. Food Res. 24: 152-159. 



(104) SIPPLE, L., WILUTS, C. O.. and WINCH, F. E., JR. 

 1963. ARCHES AND BURNERS FOR OIL-FIRED MA- 

 PLE SAP EVAPORATORS. U.S. Agr. Res. 

 Serv. ARS 73^0, 14 pp., illus. 



(105) Smith, H. C. 



1971. sap volume flow as influenced by tub- 

 ing diameter and slope percent. u.s. 



Forest Serv., Northeast. Forest Expt. Sta. 

 Res. Note NE-137, 6 pp. 



(106) and GIBBS, C. B. 



1970. COMPARISON OF VACUUM AND GRAVITY SAP 

 FLOWS FROM PAIRED SUGAR MAPLE TREES. 

 U.S. Forest Serv., Northeast. Forest Expt. 

 Sta. Res. Note NE-122, 4 pp. 



(107) Snyder, C. F.. and Hammond, L. D. 



1946. WEIGHTS PER UNITED STATES GALLON AND 

 WEIGHTS PER CUBIC FOOT OF SUGAR SOLU- 

 TIONS. I U.S.I Natl. Bur. Standards Cir. 457, 

 28 pp. [Processed.! 



(108) Sproston, T., Jr., and LANE, S. 



1953. MAPLE SAP contamination AND MAPLE 

 SAP BUCKETS. Vt. A}jr. Expt. Sta. Pam. 28, 4 

 pp. 



(109) and SCOTT, W. W. 



1954. VALSA LEUCOSTOMOIDES, THE CAUSE OF 

 DECAY AND DISCOLORATION IN TAPPED 

 SUGAR MAPLES. Phytopathology 44: 12-13, 

 illus. 



(110) STEVENSON, D. D., and BaRTOO. R. A. 



1940. COMPARISON OF THE SUGAR PER CENT OF 

 SAP IN MAPLE TREES GROWING IN OPEN AND 

 DENSE GROVES. Pa. State Forest Sch. Res. 

 Paper 1, 3 pp. [Processed.! 



(111) Strolle, E.g., Cording, J., Jr., and Eskew, R. K. 



1956. AN ANALYSIS OF THE OPEN-E'AN MAPLE- 

 SIRUP EVAPORATOR. U.S. Agr. Res. Serv. 

 ARS 73-14, 14 pp., illus. 



(112) TAYLOR, F. H. 



1956. VARIATION IN SUGAR CONTENT OF MAPLE 

 SAP. Vt. Agr. Expt. Sta. Bui. 587, 39 pp. 



(113) Trenk, F. B., and McNall, P. E. 



1954. COSTS OF PRODUCING MAPLE SYRUP IN Wl.s- 

 CONSIN. IWis. Agr. Expt. Sta.! 6 pp., il- 

 lus. [ Processed. 1 



(114) TRESSLER, C. J., and ZIMMERMAN, W. 1. 



1942. THREE YEARS' OPERATION OF AN EXPERI- 

 MENTAL SUGAR BUSH. N.Y. State (Geneva) 

 Agr. Expt. Sta. Bui. 699, 24 i)p.. illus. 



(115) 



(116) 



(117) 



Underwood, J. C. 



1963. QUICK TEST FOR "BUDDY" FLAVOR IN MAPLE 

 SIRUP. U.S. Agr. Res. Serv. ARS 7.3-12, 4 pp. 



EFFECT OF HEAT ON THE FLAVORING COM- 

 PONENTS OF MAPLE SIRUP: A PRELIMINARY 

 STUDY BY GAS CHROMATOGRAPHY. Jour. 

 Food Sci. 36: 228-230. 



and FlUPIC, V. J. 



GAS CHROMATOGRAPHIC IDENTIFICATION OF 

 COMF'ONENTS IN MAPLE SIRUP FLAVOR EX- 

 TRACT. Assoc. Off. Agr. Chem. Jour. 46: 

 334-337. 



(118) 



(119) 



(120) 



(121) 



(122) 



(123) 



(124) 



(125) 



(126) 



(127) 



and LENTO, H. G. 



1960. SOME PHYSICAL CHARACTERISTICS OF THE 

 2,4-DINITROPHENYLHYDRAZINE AND SEMI- 

 CARBAZIDE DERIVATIVES OF THREE-CARBON 

 CARBONYLS. Anal. Chem. 32: 1656-1658. 



LENTO, H. G., Jr., and WiLLITS, C. O. 



1956. TRIOSE COMPOUNDS IN MAPLE SIRUP. Food 



Res. 21: 589-597. 

 Lento, H. G., Jr., and Willits, C. O. 



1959. BROWNING OF SUGAR SOLUTIONS. 3. EF- 

 FECT OF PH ON THE COLOR PRODUCED IN 

 DILUTE GLUCOSE SOLUTIONS CONTAINING 

 AMINO ACIDS WITH THE AMINO GROUP IN 

 DIFFERENT POSITIONS IN THE MOLECULE. 

 Food Res. 24: 181-184. 



and WILUTS, C. O. 



1959. SCALE IN MAPLE-SIRUP EVAPORATORS- 

 HOW TO REMOVE IT. U.S. Dept. Agr. Inform. 

 Bui. 203, 4 pp. 



Willits, C. O., and Lento, H. G. 



1961. BROWNING OF SUGAR SOLUTIONS. VI. ISO- 

 LATION AND CHARACTERIZATION OF THE 

 BROWN PIGMENT IN MAPLE SIRUP. Jour. 

 Food Sci. 26: 397-400. 



WILUTS, C. O., and LENTO, H. G. 



1961. MAPLE SIRUP. XVI. ISOLATION AND IDEN- 

 TIFICATION OF COMPOUNDS CONTRIBUTING 

 TO THE FLAVOR OF MAPLE SIRUP. Jour. 

 Food Sci. 26: 288-290. 



United States Department of Agriculture. 



1949. trees; the yearbook of agriculture, 



1949. 944 pp., illus. Washington, (Various 

 references to maple sugar.) 



1952. AGRICULTURAL STATISTICS 19!-.2. 876 pp. 

 Washington. 



1956. AGRICULTURAL STATISTICS ig.'io. 610 pp. 

 Washington. 



1963. AGRICULTURAL STATISTICS 19fi2. 741 pp. 

 Washington. 



(128) 



1972. AGRICULTURAL STATISTICS 197 

 Washington. 



759 pp. 



