Dating carl zeiss microscopes
Its serial number was #68837, and the reference card is dated 15 October 1943.Thus, my microscope is 6,838 serial numbers earlier than October 1943—but the numbers do not necessarily apply to the same model; probably not (by the way, this e Bay microscope, which was supplied with Carl Zeiss Jena objectives 81/0.20, 40/0.65, 90/1.25, and 6X and 9XK eyepieces, sold for 5.99 after 24 bids).The stage required disassembly, refinishing, relubrication, and reassembly.
" data-medium-file="https:// WWII_07-201x300.jpg" data-large-file="https:// WWII_07.jpg" / Stains and reagents.
It can also be used for fibrin network in blood smears (fibrin stains violet; white cells appear as irregularly-shaped black dots; platelets appear as black dots). In hematological methods, it is used for the visualization of blood parasites and/or protozoans; the nuclei of blood parasites/protozoans appear red. It is also used in conjunction with the carbol fuchsin to carry out the classic Ziehl-Neelsen staining for mycobacteria, which are normally difficult to stain because of the high proportion of lipid and wax in their cell walls. Xylol (xylene) solvent for cleanup after using cedarwood oil. In the figure, the removable top tray has been moved to the open cover (left), and the instrument retaining clamps have been opened.
Once stained, acid-fast mycobacteria remain red after counterstaining with methylene blue, even after treatment with strong decolorizing solutions, such as acid-alcohol. This is for making up Gram’s stain for differentiation and characterization of bacteria—even for bacteria in sections (Gram positive organisms are stained violet; Gram negative organisms are stained red; nuclei are stained pink; cytoplasm is stained yellow. This mixture of, typically, 3 ml HCL and 97 ml 95% ethanol is used for decolorizing in staining procedures. (White mineral oil; liquid petrolatum) a general protectant and lubricant. The tray instruments, consist of a two-part (wood bottom; aluminum top) screw-together innoculating needle hallmarked with a crown surmounting a caduceus, (far left in the photo); an 8 cm length of platinum or nichrome wire for the innoculating needle; a two-part metal tube containing three 5 cm long straight dissecting needles; a 13 cm long dissecting needle holder, with thumb screw clamps, also hallmarked with a crown surmounting a caduceus; a 14 cm long section lifter, hallmarked with crown surmounting caduceus; and two 9 cm long brushes with plastic handles.
Some chips in the paint needed to be touched up, and all of the optics thoroughly cleaned. I do not have any Winkel-Zeiss catalogs or reference material; however, I did find some information in a 1934 edition of a Zeiss, Jena catalog (Carl Zeiss Jena, 1934). Figure 7 is a copy of p.147 from this section, and illustrates, at the far right, what I take to be the immediate precursor of the microscope under review.
The Zeiss Historica website ( states that “Rudolph Winkel was a contemporary of Carl Zeiss in the field of microscopes but gradually the family participation in the business declined and it was sold to Carl Zeiss who kept it as a totally separate business until 1954 when it became the microscope division of Carl Zeiss (Oberkochen). The name is seen as Winkel, Rudolph Winkel, Winkel-Zeiss, or Zeiss-Winkel. Specifically, the stand GTB most closely resembles the one in this kit, although the pillar, limb, location of focus controls, and substage condenser adjustment are of different appearance; clearly there were design changes during the decade following issuance of this catalog.