[He takes it from her without looking, and slides the dish of whatever it is he's examining out from under the microscope. He holds it up to peer at it from a slightly different angle.
Then:]
Sulfuric acid. Now, please.
[The "please" is kind of pointless when you say it in that tone, Sherlock.]
no subject
Then:]
Sulfuric acid. Now, please.
[The "please" is kind of pointless when you say it in that tone, Sherlock.]