TEXT FIGURES 



Studies in Inheritance op Certain Characters op Crosses between 



Dairy and Beef Breeds of Cattle 



Page 



Fig. I. Service and birth records used at Maine Experiment Station 6 



2. Diagram showing graphically the number and sex sequence of the births 



composing the crossbred herd 8 



Hardening Process in Plants and Developments from Frost Injury 



Fig. I. Graph showing change of the hydrogen-ion concentration of cabbage- 

 leaf juice on freezing. Freezing at point x, thawing at point y 99 



2. Graph showing increase in acidity with increasing depression of the 



freezing point on concentration of cabbage juice, i and 2, midrib 

 juice; 3 and 4, juice from leaf minus midrib 100 



3. Titration graphs for cabbage juices: i, juice from midrib; 2, juice from 



rest of leaf. Precipitation was observed at points marked "x " . . . . 102 



Chemistry op Sweet-Clover Silage in Comparison with Alfalfa Silage 



Fig. I. Graphs showing the acidity in water and alcoholic extracts of silage; 



obtained by colorimetric titration with phenolphthalein 117 



2. Graphs showing the quantity, in cubic centimeters, of alkali used in 



water and alcoholic extracts of silage; obtained by electrometric 

 titration to Pg 7 121 



3. Graphs showing quantity, in cubic centimeters, of alkali used in alco- 



holic extract of silage; comparison of colorimetric titrations with 

 phenolphthalein, and electrometric titrations to Pq 7 122 



4. Graphs showing quantity, in cubic centimeters, of alkali used in water 



extract of silage; comparison of colorimetric titrations with phenol- 

 phthalein, and electrometric titrations to Ph 8.3 124 



5. Graphs showing quantity, in cubic centimeters, of alkali used in alco- 



holic extract of silage; comparison of colorimetric titrations, with 

 phenolphthalein, and electrometric titrations to Ph 9-3 124 



Catalase and Oxidase Content of Seeds in Relation to Their Dor- 

 mancy, Age, Vitality, and Respiration 



Fig. I. Graphs showing the effect of the acidity of dioxogen upon the catalase 

 activity of after-ripened peach seeds; also the buffer effect of the 

 seed material: i, 0.2 gm. of seed material, dioxogen neutralized; 

 2, 0.2 gm. of seed material, dioxogen not neutralized; 3, 0.05 gm.of 

 seed material, dioxogen neutralized; 4, 0.05 gm. of seed material, 

 dioxogen not neutralized 143 



2 . Graphs showing changes in viability and catalase activity in Johnson 



grass, caused by aging: Solid line =catalase, broken line = viability . 152 



3 . Graphs showing changes in viability and catalase activity in Johnson 



grass caused by heating air-dry seeds at 81° C. for various lengths of 

 time: Solid line=catalase, broken line = viability 154 



(XII) 



