Laboratories, their planning and fittings . PLfln AT flfl PLfln Strip- lill I I FEET. Fig. 43.—Metallurgical Furnace Details. to give means for equalizing the draught when several furnaces are in usetogether. Fig. 44 shows a furnace room in Fischers laboratory. On the left is afan and motor for giving a forced draught ; to the right a wind furnace ofa detached type made of fireclay blocks, cased in iron externally ; and in thecorner on the right a somewhat similar but smaller furnace operated by gas. r UK R K() UIR K M K N IS OF C H KM I ST R Y 69 Other fittings rei|uircd in the furnace r
Laboratories, their planning and fittings . PLfln AT flfl PLfln Strip- lill I I FEET. Fig. 43.—Metallurgical Furnace Details. to give means for equalizing the draught when several furnaces are in usetogether. Fig. 44 shows a furnace room in Fischers laboratory. On the left is afan and motor for giving a forced draught ; to the right a wind furnace ofa detached type made of fireclay blocks, cased in iron externally ; and in thecorner on the right a somewhat similar but smaller furnace operated by gas. r UK R K() UIR K M K N IS OF C H KM I ST R Y 69 Other fittings rei|uircd in the furnace room are one or two strong benchesfor cutting metal and using mortars, and for a small milling machine ; andperhaps one or more pieces of tree trunk about 2 ft. 6 ins. long and withiron bands at the top i\)r use as blocks for hammering and the like. Bins orretaining boards for coke and possibly also for ores, used in experimentalwork, will also be necessary. Metallurgical Laboratory.—? The necessity for a laboratory for metal-. FiG. 44.—Metallurgical Laboratory, Chemical Institute, Berlin. lurgy will depend largely on the magnitude of the department and its oppor-tunities of utilizing other laboratories which the institution may important work has recently been done on the microstructure ofmetals, and for this work microscope benches and photographic facilities arenecessary. Etching with acids and other chemicals is also required. Theworking benches are of ordinary construction, those for microscope workbeing lower (see Chapter IV). A fume cupboard is required, and a bench 70 LABORATORIES of incombustible material, as described for physical chemistry (page 62),will sometimes prove valuable. If balance cases have to be designed, par-ticulars should be ascertained, since one or more assay balances are often ofmuch greater size than those in use for ordinary work. Liquid Air Room.—Liquid air is produced on a small scale in allchemical departments of any magnitu
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