453 NEW JERSEY AGRICULTUEAL COLLEGE 



leaved type is upon the other. Several other plants with this filiform 

 type of tomato foliage were met with among the crosses of the year. 

 They seem of no economic value, but as a mutation attempts will be 

 made to determine the permanence of the above-mentioned cha"ractar. 

 Plate VI. shows the four types of foliage found in the "Magnus- 

 Dwarf Champion" cross. At a is a tip of a dwarf, fine- leaved plant, 

 at & a standard, fine-leaved, at c a dwarf, coarse-leaved and at d a 

 standard, coarse-leaved plant. The older leaves of the plants show 

 greater differences than their younger ones. 



A Study of the Crosses. 



The plan was to have the crosses in what may be called families — 

 that is, associated with each cross it was intended to have the follow- 

 ing: (1) male parent upon the cross, (2) the cross upon male parent, 

 (3) female parent upon the cross, and (4) the cross upon the female 

 parent. For example, the first cross upon the list is "Arcadia" (4) 



4 

 upon "Acme" 2, expressed in the record books by the fraction "2". The 



"family" of which this is the head is : 



4 4 2 4 



= -^ = -jr- m. p. X I p. X 



4 2 4 2 or — — — ^— 



^' :^=' -i-' =^' "^ X ' m. p ' X ' f. p. 



2 4 2 2 ^ 



The double bar in the fraction separates the two members of the 

 second cross; m. p. are the initials for male parent and f. p. for 

 female parent. This gives double reciprocals of the cross with the 

 parents and furnishes a set of four three-quarter "bloods," two of 

 them upon the male and two upon the female side. 



Full "families" were obtained in only a few cases, for example, 



(4} (103) 



"Arcadia" upon "Acme" {2); "Ponderosa" upon "Marvel" (77); 



(75) 



"Magnus" upon "Ponderosa" (lua); "Mikado" upon "Princess" 



(89) (12.=t) 



(109) ; "Stone" upon "South Jersey" (iiyj ; "Dwarf Stone" upon 



(171) (62) 



" Dwarf Champion " (163); "Ignotum" upon "Red Peach" (178), 



(62) 



and "Ignotum" upon "Red Plum" (isu). There were many 

 "families" with only a single member lacking. Attention is first 

 given to the complete sets. 



