June, 1913.] The Mosaic Disease of the Tomato. 173 



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59. (Not seen). 

 Sturgis, W. C, 1899. Preliminary Notes on Two Diseases of Tobacco. 



Ann. Rept. Conn. Agr. Exp. Sta. 22 : 242-255. 

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EXPLANATION OF PLATES. 



Plate VII. 



A photograph of leaf showing the mottled effect; the light spots were 

 the yellow areas between the veins. Transmitted light was employed in 

 securing this photograph. 



Plate VIII. 



The figures were drawn with the aid of a camera. A one inch ocular 

 and 4mm. objective were used in each case. The figures have been reduced 

 one-half. Matured tissues of the same age were selected for making the 

 drawings. 



Fig. 1. A yellow area showing the cuboidal palisade cells. 



Fig. 2. Section from a healthy leaf. 



Fig. 3. Section from a green area adjoining a j^ellow spot. 



