ientific demonstrations. tical bench on which may be supported a great variety of chemical and physical apparatus. A polariscope, a Fig. 4 shows an improved form of oil burner. This is constructed on the studenit’s lamp principle, and is microscope, and a spectroscope may be applied to this… … Wi HOWELL & 69.M., Fier, 5.—OXYHYDROGEN BURNER. to various purposes, aside from lantern use, including adjustment. This lamp gives unusually strong light, of lantern called the Criterion. In this cut the various theater stage lighting, photo-engraving, etc. entirely free from smoke and disagreeable…
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