Summary

Portrait of C. V. Boys C. V. Boys Littell's Living Age — Volume 148…

If the fork is not removed when the spider has arrived it seems to have the same charm as any fly; for the spider seizes it, embraces it, and runs about on the legs of the fork as aften as it is made to sound, never seeming to learn by experience that other things buzz besides its natural food.
Source: Wikisource

Portrait of C. V. Boys C. V. Boys Littell's Living Age — Volume 148…

If when a spider has been enticed to the edge of the web the fork is withdrawn and then gradually brought near, the spider is aware of its presence and of its direction, and reaches out as far as possible in the direction of the fork; but if a sounding-fork is gradually brought near a spider that has not been disturbed, but which is waiting as usual in the middle of the web, then instead of reaching out towards the fork the spider instantly drops at the end of a thread of course.
Source: Wikisource

Portrait of C. V. Boys C. V. Boys Littell's Living Age — Volume 148…

If the spider is not at the centre of the web at the time that the fork is applied, it cannot tell which way to go until it has been to the centre to ascertain which radial thread is vibrating, unless of course it should happen to be on that particular thread or on a stretched supporting thread in contact with the fork.
Source: Wikisource

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