Bob was found with 30 brand new televisions in their original packaging in his apartment. The police thought Bob must have stolen them, but no one had reported the televisions stolen. There was not sufficient evidence of the to proceed with the prosecution.

Corpus delicti.

Explanation:

The Corpus Delicti a term that is used to describe the basis of a crime (it's literal meaning, from Latin, means "body of the crime"). This principle means, in other words, that the crime has to be proven before convicting the suspect of the crime. Therefore, Bob can't be convicted for, allegedly, stealing 30 televisions given that no one had reported them stolen.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals