Francis Preston Venable in 1887.
Three types of laboratory burners are the Tirrill Burner, Bunsen Burner, and the Meker Burner. The Tirrill and Meker Burner have air and gas adjustments while the Bunsen Burner has only an air adjustment. Hope that helps.
In the context of chemistry, this is likely to refer to a type of burner. The difference between a Bunsen burner and a Tirrill burner has to do with how the air flow is regulated ... a Bunsen burner usually has slits at the base of the barrel to admit air, while in a Tirrill burner the airflow is controlled by means of a needle valve. Burners in a real chemistry lab are actually more likely to be of the Tirrill type than the Bunsen type, since the needle valve allows better regulation of the air-gas mixture and therefore a steadier more reliable flame. There are some other modifications as well (the most common one being the Meker, which is the one with the "big head" that has a grid inside it, which spreads the heat more evenly). I've also seen a kind with horizontal slits where incoming air is regulated by screwing the entire barrel up and down (this is less common, as the barrel may become uncomfortably warm to touch, though it usually takes some time for this to happen and the adjustment of the air/gas mix usually happens immediately after the burner is ignited). I don't know if that type has an official name, or if so what it is.
The future tense of "operate" is "will operate"
Routers operate at layer 3. LAN switches operate at layer 2. Ethernet hubs operate at layer 1.
The verb of operation is operate.As in "to operate on something".An example sentence is "we need to operate on his tumour".Or "can you operate the forklift?"
wing operate by air
operate
Operate
how do headlights operate? how do headlights operate?
How does a windmill operate? < this guy is stupid
how to operate virtual dj???