64 CIRCULAR 3 3 3, U.S. DEPARTMENT OF AGRICULTURE 



(40) Keauch, H. 



1918. SOME NEW ASPECTS REGARDING THE USE OF THE FOREST SERVICE 



standard { GRADiMETER ) hypsometer. Jour. Forestry 16 : 772- 

 776, illus. 



(41) 



1922. A NEW METHOD OF MEASURING TREE HEIGHTS ON SAMPLE PLOTS. 



Jour. Forestry 20 : 220-222. 



(42) 



1924. COMPARISON OF TAPE AND CALIPER MEASUREMENTS. J0U1\ Forestl'V 



22: 537-538. 



(43) Leffelman, L. J., and Hawley, R. G. 



1925. STUDIES OF CONNECTICUT HARDWOODS : THE TREATMENT OF ADVANCE 



GROWTH ARISING AS A RESULT OF THINNINGS AND SHELTERWOOD 



cuttings. Yale Univ. School Forestry Bull. 15, 68 pp., illus. 



(44) Lutz, H. J. 



1930. THE VEGETATION OF HEART'S CONTENT, A VIRGIN FOREST IN NORTH- 

 WESTERN Pennsylvania. Ecology 11 : 1-29, illus. 



(45) McArdle, R. E. 



1928. RELATIVE ACCURACY OF CALIPERS AND DIAMETER TAPE IN MEASURING 



douglas fir trees. Jour. Forestry 26: 338-342. 



(46) and Chapman, R. A. 



1927. measuring tree heights on slopes. Jour. Forestry 25 : 843-847, 

 illus. 



(47) and Meyer. W, H. 



1930. THE YIELD OF DOUGLAS FIR IN THE PACIFIC NORTHWEST. U.S. Dept. 



Agr. Tech. Bull. 201, 64 pp.. illus. 



(48) McCarthy, E. F. 



1924. comment on tapes and calipers. Jour. Forestry 22: 539. 



(49) McGinnies, W. G. 



1930. the quadrat. Jour. Forestry 28 : 23-27. 



(50) Moore, E. B. 



1931. A METHOD OF MAPPING DETAIL ON SAMPLE PLOTS UNDER HEAVY 



brush cover. Jour. Forestry 29: 1075-1076. 



(51) Morey, H. F. 



1931. a test of hypsometers on short trees. Jour. Forestry 29: 

 233-237. 



(52) 



1931. TAGS AND PAINTED NUMBERS ON TREES IN PERMANENT SAMPLE PLOTS. 



Jour. Forestry 29 : 821-822. 



(53) Morgan, M. F. 



1932. MiCROCHEMiCAL soil tests. Conn. Agr. Expt. Sta. Bull. 333. 



pp. [111]-132, illus. 



(54) Nichols, G. E. 



1930. methods in the floristic study of vegetation. Ecology 11: 

 127-135. 



(55) Noyes, D. K. 



1916. COMPARATIVE TEST OF THE KLAUSSNER AND FOREST SERVICE STANDARD 



hypsometers. Soc Amer. Foresters Proc. 11 : 417-424. 



(56) Olsen, C. F. 



1932. A CORE-EXTRACTING DRILL FOR CLOGGED INCREMENT BORERS. Jour. 



Forestry 30: 228-229, illus. 



(57) Oudin, A. 



VUES D'ENSEMBLE SUR L'ORGANISATION EN FRANCE DES RECHERCHES 

 DE SYLVICULTURE ET D'ECONOMIE FORESTTERE : LES METHODES. 



Ann. Ecole Nat. Eaux et Forets et Sta. Recherches et Expe- 

 riences Forestieres 3 (fasc 2) : [229]-266. (Summary in Eng- 

 lish, pp. [2631-264; in German, pp. [265]-266.) 



(58) Paeth, W. J. 



1914. OBTAINING VERTICAL CONTROL OF PRACTICAL VALUE WITH THE ABNEY 



hand level. Forestry Quart. 12: [347] -369. 



(59) Patterson, J. E. 



1926. micrometer slide adapted to core measuring. Jour. Forestry 



24: 691-693, illus. 



(60) Reineke, L. H. 



1926. the determination of tree volume by planimeter. Jour. For- 

 estry 24 : 183-189, illus, 



