There is no historical record of a person named Mary who made significant contributions to science. It is possible that you are thinking of a different individual, or perhaps the name is a misremembered or misheard detail.

To help me understand your request better, could you please provide me with more information?

For example, you could:

* Tell me about the specific scientific field you are interested in. This could help me narrow down potential candidates.

* Provide any additional details you remember about this Mary, such as her approximate time period or the nature of her invention.

With more information, I can hopefully assist you in finding the person you are looking for.