Mueseler Lamp. – This is a Belgian lamp (see Fig. 354), and may be described as a modification of the Clanny. There is a metal chimney by which the products of combustion are conducted to the upper part of the gauze cover. There is a horizontal diaphragm of gauze covering the lamp at the top of the glass, the only opening being where the chimney passes through, the gauze being tightly fastened to the chimney. The air enters the lamp through the outer gauze above the glass, descends through the horizontal gauze to the flame, ascends the internal chimney, and escapes through the upper part of the outer gauze. This lamp will burn brightly on account of the regulated air-current. It is also safer than the Clanny, because the entering air has to pass through two gauzes, and the escaping air has to pass up a chimney full of burnt air, which cannot support combustion, and then through the outer gauze; and also, if the lamp is held on one side, the flame, instead of cracking the glass, will go out. The lamp will go out if held in inflammable gas. The Mueseler lamp must always be carried by the ring at the top, and suspended in a vertical position. This lamp is unsafe in an explosive current of 15 feet a second.