Does the word seismograph need to be capitalized?

No, the word "seismograph" does not need to be capitalized.

Here's why:

* Common Nouns: "Seismograph" is a common noun, referring to a specific type of instrument. Common nouns are not capitalized unless they are part of a proper noun (like a specific name).

* Proper Nouns: Proper nouns, like names of people, places, or specific things, are capitalized. For example, the "Richter Scale" would be capitalized because it's a specific name.

Let me know if you have any other questions!