How did people use a telegraph to communicate without speech? with a series of bells of varying pitches with words typed out on a typewriter with morse code with overland mail carriages?

The answer is "with Morse code".

Morse code is a technique for transmitting content data as a progression of on-off tones, lights, or snaps that can be straightforwardly comprehended by a learned audience or onlooker without special gear. It is named for Samuel F. B. Morse. Every Morse code sign speaks to either a content character (letter or numeral) or a prosign and is spoken to by a distinct sequence of dabs and dashes.

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radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.