Show violet rays detect seeds violet rays are now used to protect the american farmer but the rays are used on grass seeds not the farmer the rays used in an almost uncanny test make italian ry egrass sometimes sold as english ry egrass reveal its true identity when the seeds are germinated on filter paper and put in a darkened chamber and the short rays played upon them the paper on which the roots of the italian variety lie ae at once betray the seed hy by giving oft off a distinct ghostlike glow kven more mystifying the apparently identical seeds of the english variety when tested side by side with ith the ital lan ian fall fail to react some seeds of the two varieties are otherwise distin Ink In listIn gui gul but the variety us unify brings a higher price the dis covery cover that short rays would make the filter paper fluoresce nuo on which th roots of certain plants grow was made in germany and the department of agriculture has adopted it to protect american farmers in buying seed |