I was thinking more along the lines of you going in there and claiming her.
The " gradient of temperature " is the fall of temperature in degrees per unit length along the lines of flow.
I was thinking more along the lines that he can have no objection when I ask you to dinner, if he's out of the picture.
Such a vascular cylinder is called a haplostele, and the axis containing it is said to be haplostelic. In the stele of the root the strands of tracheids along the lines where the xylem touches the pericycle are spiral or annular, and are the xylem elements first formed when the cylinder is developing.
Whether systematic training can do anything to make the attainment of this balance easier is a question that has lately engaged the attention of many educational reformers; and whatever future casuistry may still have before it would seem to lie along the lines indicated by them.