XVI Journal of Agricultural Research voi. iv 



Prickly-Pears as a Feed for Dairy Cows 



Page 



Fig. I . Effect of northers upon yield of milk by cows fed with different rations . . 429 

 A Nasturtium Wht Caused by Bacterium Solanacearum 



Fig. I. Section of nasturtium leaf four days after spraying with suspension of 



Bacterium solanacearum 454 



2. Cross section of a vein of nasturtium leaf showing vascular infection 



nine days after spraying with suspension of Bacterium solanacearum . . 454 



3. Cross section of stem of one of the infected nasturtiums from Baltimore, 



Md., showing the bacterial invasion of a bundle with the beginning 



of bacterial cavities 455 



Tylenchus Similis, the Cause op a Root Disease of Sugar Cane and 



Banana 



Fig. I. Tylenchus similis: Nearly adult female, a, Lip region; b, spear guide; 

 c, 3-bulbed base of spear; d, ampulla, salivary gland; e, oesophageal 

 lumen;/, oesophagus; g, median bulb; h, nerve cells; i, nerve ring; 

 j, excretory pore; k, initial intestinal cells; /, anterior salivary gland; 

 m, m, end of ovary; n, ovum; 0, renette duct; p, posterior salivary 

 gland; q, fat granule, intestine; r, renette cell (?); s, terminus; t, cau- 

 dal pore; u, vulva; v, anus; w, crenate cuticle; x, x, spermatozoa . . . 565 

 2. Tylenchus similis: Male, a, Lip region; c, base of the spear; e, ceso- 

 phageal lumen;/, cesophagus; g, vestige of bulb; h, nerve cell; i, nerve 

 ring; j, excretory pore; /, a nerve cell; m, end of testis; q, fat granule 

 of intestine; s, terminus; t, bursal papilla; v, accessory piece; x, sper- 

 matozoa; y, left spiculum ; 2, bursa 567 



