230 Maine Agricultural Experiment Station. 1920. 



Normal germination of grass-fruits 199 



Polyembryony in grasses 214 



Potash, deleterious impurities 92 



Potato mosaic 157 



appearance of diseased plants 160 



isolation of diseased stock 183 



methods of control 180 



proofs of infectiousness 164 



removal of diseased plants 182 



symptoms varying with locality 179 



transmission by Colorado beetles 175 



contact 1 76 



flea beetles 174 



grafts 164 



insects 168 



juice inoculations 166 



plant lice 169 



seed cutting knife 175 



soil 178 



tubers 163 



varietal resistance and immunity 180 



Potatoes, fertilizers used 93 



in a three year rotation 93 



inj ured by borax 95 



Self sterility and self fertility in the apple 63 



cross sterility in the apple 61 



Self sterility in apples, causes s 81 



Treasurer's report 



Variation of butter-fat and age of cattle 133 



Weather record 



Wheat, Aroostook grown, chemical character 27 



physical characteristics ' 17 



protein analysis 27 



weight of kernels 17 



yield 25 



Bluestem and Red Fife in Aroostook 48 



Chemical composition and quality 6 



flours, chemical analyses ' 37 



gluten, chemical qualities 4 



improvement, methods 13 



influence of environment en texture of kernel 7 



Minnesota, protein content 29 



investigations 1 



origin of pure lines in Maine 14 



quality and climate 3 



varieties grown at Aroostook Farm 14 



