Grammar Writing
My current investigations deal with 19th-century prescriptive grammar writing. On prezi.com you can find several of my presentations on the topic, e.g.
The GET-Passive in 19c grammars of English

Prezi-Presentation
I am particularly interested in the question whether prescriptive grammar writing had an influence on actual language use. You can find my answer here:
Measuring the Success of Prescriptivism
Prezi-Presentation