A few experimenters have carried the verification much further.
The experimental proof, however, was still lacking, and though several experimenters had come very near its discovery, Hertz was the first who actually succeeded in supplying it, in 1887.
The constitution of fulminic acid has been investigated by many experimenters, but apparently without definitive results.
There is little direct evidence pointing to this extension of the power, and many experimenters directly contradict the statements of Frank.
Mosquitoes caught by the experimenters, and sent to London, produced malaria in persons who submitted themselves to the bites of these insects at the London School of Tropical Medicine.