Oct. 4, ipis-Mar. 27, 1916 



Illustrations xiil 



Page 

 Plate XXXIX. Fig. i. — A rotting area in an overripe fruit of S. D. No. 3. 

 Fig. 2. — Tip of hypha in Opata plum. Fig. 3. — The edge of a rotting spot 

 in a green fruit of Opata plum. Fig. 4. — Tissue of apple infected with 

 Penicillium expansum. Fig. 5. — Cross sections of hyphse in tissue of Opata 

 plum 18 hours after inoculation. Fig. 6. — Portion of the rotted area of an 

 Opata plum 18 hours after inoculation 396 



Inheritance op Length op Pod in Certain Crosses 



Plate XL. Typical 5-seeded bean pods, showing the length of parents and 



crosses 420 



A Honeycomb Heart-Rot ok Oaks Caused by SterEum subpileatum 



Plate XLI. Fig. i. — Quercus alba: A radial view of the honeycomb heart-rot 

 produced by Stereum subpileatum, showing various stages of the rot. Fig. 

 2. — Querciis alba: A radial view of the last (honeycomb) stage of the rot. 

 Fig. 3. — Quercus alba: A tangential view of honeycomb-rot, showing early 

 stage of delignification. Fig. 4. — Quercus velutina: A radial view of honey- 

 comb heart-rot as it occurs in tops of trees, showing pockets filled with 

 strands of cellulose. Fig. 5. — Quercus alba: A radial viewof the honeycomb- 

 rot, showing pockets lined with cellulose. Fig. 6. — Quercus alba: A cross- 

 sectional viewof the honeycomb heart-rot, showing pockets limited by large 

 medullary rays. Fig. 7. — Quercus alba: Radial view of honeycomb heart- 

 rot in branch, showing last stage of rot. Fig. 8. — Quercus lyrata: Radial 

 view of honeycomb heart-rot in old log associated directly with the sporo- 

 phores of 5. subpileatum. Fig. 9. — Quercus texana: Sporophore of 5. 

 subpileatum. Fig. 10. — Quercus palustris: Sporophore of S. subpileatum, 

 conchate form 428 



Influence of Growth of Cowpeas upon Some Physical, Chemical, 

 AND Biological Properties 



Plate XLH. Experimental plots at Missouri Experiment Station: Fig. i. — 

 Plot D (right), unplowed, no crop, kept clean; plot E (center), unplowed, 

 planted to cowpeas; plot F (left), plowed, planted to cowpeas. Fig. 

 2. — Plot G (right), plowed, no crop, artificially shaded; plot H (left), 

 plowed, no crop, kept clean 448 



Angular Leaf-Spot of Cucumbers 



Plate XLIII. Fig. i. — Cucumber leaf eight days after inoculation with 

 Bacterium lachrymans. Fig. 2. — Cucumber leaf 12 days after spraying with 

 Bad. lachrymans 476 



Plate XLIV. Cucumber stem diseased by Bacterium lachrymans 476 



Plate XLV. Fig. i. — Fragment of a cucumber leaf showing angular leaf -spots 

 due to pure-culture inoculation with Bacterium lachrymans. Fig. 2. — 

 Cucumber plant 18 days after spraying with Bad. lachrymans. Fig. 3. — 

 Stem at X in figure 2 enlarged to show bacterial lesions 476 



Plate XLVI. Green cucumber fruit photographed six days after inoculation 

 with Bacterium lachrymans. Fig. 2. — Same fruit as shown in figure i, but 

 at the end of 12 days. Fig. 3. — Section of green cucumber fruit 10 days 

 after inoculation with Bad. lachrymans 476 



Plate XLVII. Fig. i. — Cross section of a cucumber leaf, showing two stomatal 

 infections. Fig. 2. — Cross section of cucumber leaf, showing a dense bac- 

 terial infection due to Bacteriutn lachrymans. Fig. 3. — A, Agar-poured 

 plate from bouillon dilution of Bad. lachrymans; B, agar-poured plate made 

 from same quantity of same bouillon as .4, but after freezing 15 minutes. . 476 



