G. Gilmer Catalog No 26 (Circa 1900)

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Condensateurs composés d'une lentille bi-convexe et d'une lentille ménis- que en verre de t er choix, en mon- tures cuivre entièrement démontables. Condensers composed of one bi-convex and one meniscus lens made of best glass in brass mount, the lenses can be easily removed. Kondensatoren bestehend aus einer bikonvexen und einer Meniskus Linse aus bestem Glas in Messing- fassung. leichl auseinandernehmbar. *) N° 147 bis avec talons en cuivre fixés autour de la monture. Cette disposi- tion permet de placer le condensateur dans un manchon de 115 n, / m dediam. L’air circule alors librement tout autour du condensateur et le protège mieux contre la chaleur intense de l'arc électrique. *) N° i47 bis with small blocks of brass around the mount. This arrangement allows the condenser to be plaeed into a frame of q'/ÿ'îf diameter. The air circulâtes thus freely around the condenser and protects it against the intense heat of arc lamps. *) N° 147 bis mit 3 kleinen Messing- blûeken aufder Fassung des Konden- sators,sodassletztererin einen Trâger von 115 m /“ Durchmcsser eingcsctzl werden kann. Die Luft zirkulirt frei um den gan/.en Kondensator und wird dadurch einem Zerspringen desselben durch Uberhitzen nach Müglichkeit vorgebeugt.