. Elementary chemical microscopy. Microscopy; Microchemistry. 86 ELEMENTARY CHEMICAL MICROSCOPY of the radiant. To obviate this defect Tassin has devised an apparatus in which the radiant — either a small tungsten lamp or an acetylene burner — is attached to the illuminator mount- ing and hence in focusing, both radiant and illuminator are displaced simultaneously an equal amount; thus no realign- ment is necessary. The construction of this device will readily be understood by referring to the diagram, Fig. 37. An ordi- nary disk (or prism) illuminator I is attached to the tube T of. Fig. 37.
. Elementary chemical microscopy. Microscopy; Microchemistry. 86 ELEMENTARY CHEMICAL MICROSCOPY of the radiant. To obviate this defect Tassin has devised an apparatus in which the radiant — either a small tungsten lamp or an acetylene burner — is attached to the illuminator mount- ing and hence in focusing, both radiant and illuminator are displaced simultaneously an equal amount; thus no realign- ment is necessary. The construction of this device will readily be understood by referring to the diagram, Fig. 37. An ordi- nary disk (or prism) illuminator I is attached to the tube T of. Fig. 37. Tassin Vertical Illuminator. the microscope. Into the lower opening is screwed an aluminum adapter A which serves to hold in position the supporting bar B. The objective O is screwed into the lower end of A. The bar B carries a vertical sleeve J, fitted with a thumb-screw and serving to hold in place the remaining parts of the illuminator. The sleeve D carries a Ramsden eyepiece, securely held in posi- tion by the screw K. This eyepiece acts as a condensing lens. The correct position of the lenses to obtain a spot of bright light of the requisite diameter upon the reflecting surfaces is secured. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chamot, Emile Monnin, 1868-1950. New York, Wiley
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmicroscopy, bookyear1
