This was the only way of dealing with flies and mosquitos when I was a little girl and we were holidaying at our shack around Christmas time each year. The adults were allowed to use it, but not the children. It was, as I remember, quite effective.
Oh yes, we did have these, the mortien brand. One for the house and one for the shed. We also used hurricane lamps at night to go to the out house and cooked on a combustion stove, . (ps i am only 44 )
Boy that's a blast of the past! my grandparents used to have one, and I remember they used to stink, they had to buy this liquid to put inside, if people think the ones of today stink they ought to have a wiff of this thing!