An array of contemporary scientific instruments were gathered for the crypt such as an altimeter and a barometer, as well as common appliances like a telephone and a television. Peters also left behind a device of his innovation called a "Language Integrator", a modified Mutoscope that was a hand-operated movie projector with sound that would teach English to the future generation that came upon the crypt. This was a type of Rosetta stone and another concept carried forward to the Westinghouse Time Capsules. Peters also delivered a film he had made about the crypt entitled "The Stream of Knowledge" that was published in 1938. Jacobs left a written note for those opening the crypt in AD 8113, in which he hoped for future efforts in preservation. He pointed out that the world had been engaged in scientifically preserving the human civilization customs and culture for future generations, and in this crypt it had been presented to these people.