tment from hard coal in order to sent a more promising field for investigation than groups is used for finding the letter; and _ three burn it, that its adoption as a substitute for anthra- anything we have thus far considered. They may waves, one taken from each of the remaining groups, be roughly… … Rowland system, and they are many, the octoplex ca- illuminator. Range Oil Burner in Which the Oil is Fed by Gravity. pacity can be distributed in any convenient manner, In the blue-flame oil heater a different condition of that is, in place of having 8 operators, and a speed of affairs exists. The…
Internet Archive · Public domain (published before 1931). Free to use for anything.
